When opening the GUI for a loader (loader1x1 in my case) entity, the GUI shows the "Use Filters" checkbox and "Whitelist / Blacklist" switch at the bottom.
When changing the settings for the entity while the GUI is open by doing entity.loader_filter_mode = 'blacklist' or entity.loader_filter_mode = 'whitelist', the switch does now move (the checkbox gets updated):
This is a loader after setting a config that contains "loader_filter_mode = 'blacklist'". The entity, in alt mode shows that blacklist is selected, however the GUI still shows "whitelist".
[2.0.76] Loader GUI does not update blacklist/whitelist
Re: [2.0.76] Loader GUI does not update blacklist/whitelist
Thanks for the report. Issue is now fixed for 2.1.

