Describe the bug
KronHud's mixin conflicts with Debugify's mixin

This would also create compatibilities with similar mods such as TieFix and shadowedactionbar

I propose you use MixinExtra's WrapWithCondition where you can check if the action bar hud is enabled, render it and return false, to prevent the code from running (with a higher priority).
I know this isn't ideal but there isn't really another way to add a shadow to the text.

An extra dependency doesn't feel great.

It's very small!

If it's small and fixes compatibility, it's probably worth it then.
I would open a pull request, but I think I'll wait for a 1.19 update.

Seems to be fixed