When selecting this option in the modifiers, the choice doesn't appear in the character sheet as it does with the ranger class. This is likely a bug with the feature?

Did you attach it as part of an “Option?” The “choose a [whatever]” modifier subtypes don’t like to be put in options.

I've done all the above and in different ways, I believe the bonus is a newer feature and just doesn't work properly on the other classes at the moment. Thanks for the input though, hopefully they fix it soon. Just gonna stick to manual input until then.

If it works for Rangers it should work for everyone.