FigureWidget + go.Image.source breaks notebook kernel in VSCode

I encounter a bug in VSCode notebook when using a FigureWidget for a go.Image trace using source string instead of z attribute (px.imshow optimization).

The bug is: once you hover the image with mouse the kernel is unresponsive, i.e. you can't run any cell anymore.

The bug is not present when running the notebook through Jupyter web interface.

Reproducible example

import numpy as np
import plotly.express as px
import plotly.graph_objects as go
from plotly.utils import image_array_to_data_uri

img = (np.random.rand(10, 10, 3) * 255).astype(np.uint8)
img_str = image_array_to_data_uri(img)

# --- Using normal go.Figure is OK
# px.imshow(img) # OK
# go.Figure(go.Image(z=img)) # OK
# go.Figure(go.Image(source=img_str)) # OK

# --- Using go.FigureWidget and Image.z is OK
# go.FigureWidget(go.Image(z=img)) # OK

# --- Using go.FigureWidget and Image.source is NOT OK
# go.FigureWidget(px.imshow(img)) # NOK
go.FigureWidget(go.Image(source=img_str)) # NOK

Versions

$ conda list | grep -E 'plotly|ipykernel|pillow|numpy|pandas'
ipykernel                 6.26.0             pyhf8b6a83_0    conda-forge
numpy                     1.26.0          py312heda63a1_0    conda-forge
pandas                    2.1.3           py312hfb8ada1_0    conda-forge
pillow                    10.1.0          py312hf3581a9_0    conda-forge
plotly                    5.18.0             pyhd8ed1ab_0    conda-forge

$ code --version
1.84.2
1a5daa3a0231a0fbba4f14db7ec463cf99d7768e
x64

Reproduisez l’exemple FigureWidget fourni dans un notebook VSCode, en comparant go.Image(source=...) avec go.Image(z=...) ainsi que l’exécution web équivalente dans Jupyter. Suivez l’interaction du notebook FigureWidget déclenchée par le survol de l’image basée sur source ; l’issue est terminée lorsque le survol ne laisse plus le kernel sans réponse et que l’exécution normale des cellules continue.