Progress Bar prints many lines when validation_step is defined

Bug description

With a simple model like this:

class MyPLModule(pl.LightningModule):
    def __init__(self, model):
        super().__init__()
        self.model = model
        self.loss_func = nn.CrossEntropyLoss()

    def configure_optimizers(self):
        return optim.Adam(self.model.parameters(), lr=0.02)

    def training_step(self, batch: tuple[torch.Tensor, ...], batch_idx):
        x, y = batch
        preds = self.model(x)
        loss = self.loss_func(preds, y)
        return loss

    def validation_step(self, batch: tuple[torch.Tensor, ...], batch_idx):
        # I do nothing!
        return None

I get a console that looks like this. It runs the progress bar as it should up to about 86%, then spits out some validation stuff and from then on each update to the progress 'bar' is a new line:

If I don't have a validation_step method in my class, the progress bar works as it should.

How to reproduce the bug

No response

Error messages and logs

No response

Environment

* CUDA:
	- GPU:
		- NVIDIA GeForce RTX 3090
	- available:         True
	- version:           11.6
* Lightning:
	- pytorch-ignite:    0.4.10
	- pytorch-lightning: 1.7.7
	- torch:             1.12.1+cu116
	- torchaudio:        0.12.1+cu116
	- torchmetrics:      0.10.0
	- torchvision:       0.13.1+cu116
* Packages:
	- absl-py:           1.2.0
	- aiohttp:           3.8.1
	- aiosignal:         1.2.0
	- altgraph:          0.17.2
	- anyio:             3.6.1
	- argcomplete:       2.0.0
	- argon2-cffi:       21.3.0
	- argon2-cffi-bindings: 21.2.0
	- asttokens:         2.0.8
	- async-timeout:     4.0.2
	- attrs:             22.1.0
	- babel:             2.10.3
	- backcall:          0.2.0
	- beautifulsoup4:    4.11.1
	- black:             22.8.0
	- bleach:            5.0.1
	- blis:              0.7.8
	- bottleneck:        1.3.5
	- cachetools:        5.2.0
	- catalogue:         2.0.8
	- category-encoders: 2.5.0
	- certifi:           2022.6.15
	- cffi:              1.15.1
	- charset-normalizer: 2.1.1
	- click:             8.1.3
	- cmdstanpy:         1.0.7
	- colorama:          0.4.5
	- colour:            0.1.5
	- convertdate:       2.4.0
	- cycler:            0.11.0
	- cymem:             2.0.6
	- cython:            0.29.32
	- datasets:          2.4.0
	- debugpy:           1.6.3
	- decorator:         5.1.1
	- defusedxml:        0.7.1
	- deprecated:        1.2.13
	- dill:              0.3.5.1
	- distlib:           0.3.4
	- dtreeviz:          1.3.7
	- entrypoints:       0.4
	- ephem:             4.1.3
	- et-xmlfile:        1.1.0
	- executing:         1.0.0
	- fastai:            2.7.9
	- fastbook:          0.0.28
	- fastcore:          1.5.24
	- fastdownload:      0.0.7
	- fastjsonschema:    2.16.1
	- fastprogress:      1.0.3
	- filelock:          3.8.0
	- fonttools:         4.37.1
	- frozenlist:        1.3.1
	- fsspec:            2022.8.2
	- future:            0.18.2
	- google-auth:       2.11.0
	- google-auth-oauthlib: 0.4.6
	- graphviz:          0.20.1
	- greenlet:          1.1.2
	- grpcio:            1.48.1
	- hijri-converter:   2.2.4
	- holidays:          0.15
	- html5lib:          1.1
	- htmlmin:           0.1.12
	- huggingface-hub:   0.9.1
	- idna:              3.3
	- imagehash:         4.3.0
	- iniconfig:         1.1.1
	- ipykernel:         6.15.2
	- ipympl:            0.9.2
	- ipython:           8.5.0
	- ipython-genutils:  0.2.0
	- ipywidgets:        8.0.2
	- jedi:              0.18.1
	- jinja2:            3.1.2
	- joblib:            1.1.0
	- json5:             0.9.10
	- jsonschema:        4.15.0
	- jupyter:           1.0.0
	- jupyter-client:    7.3.5
	- jupyter-console:   6.4.4
	- jupyter-core:      4.11.1
	- jupyter-server:    1.18.1
	- jupyterlab:        3.4.6
	- jupyterlab-pygments: 0.2.2
	- jupyterlab-server: 2.15.1
	- jupyterlab-widgets: 3.0.3
	- kaggle:            1.5.12
	- kiwisolver:        1.4.4
	- korean-lunar-calendar: 0.2.1
	- langcodes:         3.3.0
	- lunarcalendar:     0.0.9
	- lxml:              4.9.1
	- markdown:          3.4.1
	- markupsafe:        2.1.1
	- matplotlib:        3.5.3
	- matplotlib-inline: 0.1.6
	- missingno:         0.5.1
	- mistune:           2.0.4
	- mplcursors:        0.5.1
	- mplfinance:        0.12.9b1
	- mpmath:            1.2.1
	- multidict:         6.0.2
	- multimethod:       1.8
	- multiprocess:      0.70.13
	- murmurhash:        1.0.8
	- mypy:              0.971
	- mypy-extensions:   0.4.3
	- nbclassic:         0.4.3
	- nbclient:          0.6.7
	- nbconvert:         7.0.0
	- nbformat:          5.4.0
	- nest-asyncio:      1.5.5
	- networkx:          2.8.6
	- notebook:          6.4.12
	- notebook-shim:     0.1.0
	- numexpr:           2.8.3
	- numpy:             1.23.3
	- oauthlib:          3.2.0
	- opencv-python:     4.6.0.66
	- openpyxl:          3.0.10
	- packaging:         21.3
	- pandas:            1.5.0
	- pandas-profiling:  3.2.0
	- pandocfilters:     1.5.0
	- parso:             0.8.3
	- pathspec:          0.10.1
	- pathy:             0.6.2
	- patsy:             0.5.2
	- pefile:            2021.9.3
	- phik:              0.12.2
	- pickleshare:       0.7.5
	- pillow:            9.2.0
	- pip:               22.3
	- pipx:              1.0.0
	- platformdirs:      2.5.2
	- playwright:        1.25.2
	- plotly:            5.10.0
	- pluggy:            1.0.0
	- preshed:           3.0.7
	- prometheus-client: 0.14.1
	- prompt-toolkit:    3.0.31
	- prophet:           1.1
	- protobuf:          3.19.4
	- psutil:            5.9.2
	- pure-eval:         0.2.2
	- py:                1.11.0
	- pyarrow:           9.0.0
	- pyasn1:            0.4.8
	- pyasn1-modules:    0.2.8
	- pycparser:         2.21
	- pydantic:          1.9.2
	- pydeprecate:       0.3.2
	- pyee:              8.1.0
	- pygithub:          1.55
	- pygments:          2.13.0
	- pyinstaller:       4.10
	- pyinstaller-hooks-contrib: 2022.2
	- pyjwt:             2.4.0
	- pymeeus:           0.5.11
	- pynacl:            1.5.0
	- pynvml:            11.4.1
	- pyparsing:         3.0.9
	- pyrsistent:        0.18.1
	- pytest:            7.1.3
	- python-dateutil:   2.8.2
	- python-slugify:    6.1.2
	- pytorch-ignite:    0.4.10
	- pytorch-lightning: 1.7.7
	- pytz:              2022.2.1
	- pywavelets:        1.3.0
	- pywin32:           304
	- pywin32-ctypes:    0.2.0
	- pywinpty:          2.0.7
	- pyyaml:            6.0
	- pyzmq:             23.2.1
	- qtconsole:         5.3.2
	- qtpy:              2.2.0
	- regex:             2022.8.17
	- requests:          2.28.1
	- requests-oauthlib: 1.3.1
	- responses:         0.18.0
	- rsa:               4.9
	- scikit-learn:      1.1.2
	- scipy:             1.9.1
	- seaborn:           0.11.2
	- send2trash:        1.8.0
	- sentencepiece:     0.1.97
	- setuptools:        63.4.3
	- setuptools-git:    1.2
	- six:               1.16.0
	- smart-open:        5.2.1
	- sniffio:           1.3.0
	- soundfile:         0.11.0
	- soupsieve:         2.3.2.post1
	- spacy:             3.4.1
	- spacy-legacy:      3.0.10
	- spacy-loggers:     1.0.3
	- srsly:             2.4.4
	- stack-data:        0.5.0
	- statsmodels:       0.13.2
	- sympy:             1.11.1
	- tabulate:          0.8.10
	- tangled-up-in-unicode: 0.2.0
	- tenacity:          8.1.0
	- tensorboard:       2.10.0
	- tensorboard-data-server: 0.6.1
	- tensorboard-plugin-wit: 1.8.1
	- terminado:         0.15.0
	- text-unidecode:    1.3
	- thinc:             8.1.0
	- threadpoolctl:     3.1.0
	- tinycss2:          1.1.1
	- tokenizers:        0.12.1
	- tomli:             2.0.1
	- tomlkit:           0.11.4
	- torch:             1.12.1+cu116
	- torchaudio:        0.12.1+cu116
	- torchmetrics:      0.10.0
	- torchvision:       0.13.1+cu116
	- tornado:           6.2
	- tqdm:              4.64.1
	- traitlets:         5.3.0
	- transformers:      4.21.3
	- treeinterpreter:   0.2.3
	- typer:             0.4.2
	- typing-extensions: 4.3.0
	- ujson:             5.4.0
	- urllib3:           1.26.12
	- userpath:          1.8.0
	- virtualenv:        20.13.3
	- virtualenv-clone:  0.5.7
	- visions:           0.7.4
	- wasabi:            0.10.1
	- waterfallcharts:   3.8
	- wcwidth:           0.2.5
	- webencodings:      0.5.1
	- websocket-client:  1.4.1
	- websockets:        10.1
	- werkzeug:          2.2.2
	- wget:              3.2
	- wheel:             0.37.1
	- widgetsnbextension: 4.0.3
	- wrapt:             1.14.1
	- xgboost:           1.6.2
	- xxhash:            3.0.0
	- yarl:              1.8.1
	- yellowbrick:       1.5
* System:
	- OS:                Windows
	- architecture:
		- 64bit
		- WindowsPE
	- processor:         Intel64 Family 6 Model 151 Stepping 2, GenuineIntel
	- python:            3.10.2
	- version:           10.0.22621

More info

This is most likely specific to PyCharm, which uses a custom console. To replicate this you need to make sure you've selected "Run with Python Console" in the run config.

Probably the most relevant bug in PyCharm is this one.

Running as a script in a terminal, it works as expected, (but I can't even see the progress bar when I use VSCode and "Run in interactive window".)

I only started looking at Lightning yesterday and it looks great, but the wall of console text makes it a bit painful to work with, since it swamps any other messages. Maybe I'll soon learn how to disable the progress meter or use the rich one. Regardless, I would suggest that if this occurs for all PyCharm users, at the very least it would be worth putting a note in the docs to lessen the bad first impression for new users.

cc @borda @awaelchli

Start by reproducing the training example in PyCharm with “Run with Python Console,” including an empty validation_step, and compare its progress output with a terminal run. Investigate the progress-bar behavior around validation and determine whether the fix belongs in Lightning or should be documented; done means PyCharm no longer produces one line per update, or the limitation and workaround are clearly documented.