Adding a new or multiple behaviour to a state has issues

1) If you create and add a new behaviour to a state, it takes a moment for the script to be added to the list, and then once it appears on the list, the behaviour is missing the disable/enable check.
Adding an existing behaviour script doesn't cause that issue

The script has to be recompiled in playmode to get that check visible again.

2) Using the object selector to change the script for the existing behaviour, causes the behaviour to disappear form the list.
You need to add another behaviour in order for the change of the script to be registered.

Expected: It's possible to add/edit the scripts without them disappearing, the disable/enable check mark should always be visible.