Data Generator doesn't set host field via token

The following configuration in pytest-splunk-addon-data.conf does replace the tokens as expected, but the ingested data shows a value of Barracuda.logfor field host. Therefore test Test_App.test_indextime_key_fields fails.

[Barracuda.log]
sourcetype = barracuda
#source =
#sourcetype_to_search = barracuda
host_type = plugin
input_type = file_monitor
index = main
sample_count = 20
#expected_event_count =
timestamp_type = event
#breaker =

token.1.token = ##time1##
token.1.replacementType = timestamp
token.1.replacement = %b %d %H:%M:%S
token.1.field = _time

token.2.token = ##host##
token.2.replacementType = random
token.2.replacement = host["ipv4"]
token.2.field = host

token.3.token = ##time2##
token.3.replacementType = timestamp
token.3.replacement = %Y-%m%d %H:%M:%S.%3Q +%z

The following config using host_type = plugin produces the exact same result.

[Barracuda.log]
sourcetype = barracuda
#source =
#sourcetype_to_search = barracuda
host_type = plugin
input_type = file_monitor
index = main
sample_count = 20
#expected_event_count =
timestamp_type = event
#breaker =

token.1.token = ##time1##
token.1.replacementType = timestamp
token.1.replacement = %b %d %H:%M:%S
token.1.field = _time

token.2.token = ##host##
token.2.replacementType = random
token.2.replacement = host["ipv4"]
#token.2.field = host

token.3.token = ##time2##
token.3.replacementType = timestamp
token.3.replacement = %Y-%m%d %H:%M:%S.%3Q +%z

Test output:

---------------------------------------------------------------------------------------------- Captured log call -----------------------------------------------------------------------------------------------
DEBUG    pytest-splunk-addon:test_templates.py:80 Base search for indextime key field test: search (index=*) sourcetype=barracuda host IN ("Barracuda.log") | table host
DEBUG    pytest-splunk-addon:test_templates.py:88 Results:[{'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}, {'host': 'Barracuda.log'}]
INFO     pytest-splunk-addon:test_templates.py:143 Some values for the following key fields are missing

Key_field | Expected_values                                                                                                                                                                                                                                                                                                        | Actual_values
--------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -----------------
host      | {'172.16.51.6', '172.16.51.7', '172.16.51.3', '172.16.51.18', '172.16.51.12', '172.16.51.8', '172.16.51.17', '172.16.51.19', '172.16.51.10', '172.16.51.11', '172.16.51.1', '172.16.51.15', '172.16.51.4', '172.16.51.16', '172.16.51.0', '172.16.51.9', '172.16.51.5', '172.16.51.13', '172.16.51.2', '172.16.51.14'} | {'Barracuda.log'}

System information:

platform darwin -- Python 3.8.6, pytest-6.1.1, py-1.9.0, pluggy-0.13.1 -- /usr/local/opt/python@3.8/bin/python3.8
using: pytest-6.1.1 pylib-1.9.0
setuptools registered plugins:
  lovely-pytest-docker-0.2.0 at /usr/local/lib/python3.8/site-packages/lovely/pytest/docker/compose.py
  pytest-splunk-addon-1.3.9 at /usr/local/lib/python3.8/site-packages/pytest_splunk_addon/plugin.py
  pytest-splunk-addon-1.3.9 at /usr/local/lib/python3.8/site-packages/pytest_splunk_addon/splunk.py
  pytest-xdist-2.1.0 at /usr/local/lib/python3.8/site-packages/xdist/plugin.py
  pytest-xdist-2.1.0 at /usr/local/lib/python3.8/site-packages/xdist/looponfail.py
  pytest-forked-1.3.0 at /usr/local/lib/python3.8/site-packages/pytest_forked/__init__.py
  Faker-4.14.0 at /usr/local/lib/python3.8/site-packages/faker/contrib/pytest/plugin.py

Start with pytest-splunk-addon-data.conf and the Test_App.test_indextime_key_fields test, comparing the two token configurations and the captured Splunk results. Trace how the host token and host_type are handled, then run the failing test. Done means the configured host token produces the expected IPv4 host values instead of Barracuda.log.