If you try to change the config for the TF spell pack, more specific the spawn chance of druids using the ingame config menu, it won't actually change and it'll just stay as the default (0.5) despite it displaying as whatever you change it too, This issue doesn't seem to be present when you edit the config file directly.

Well I never knew you could do that until just now... github has thought of everything 😅

Okay, this should probably be on the TF spell pack issue tracker but I'll see what I can do.