Hey
Thank you for clarifying what you were seeing, I greatly appreciate it. I have spoken back and forth with one of our developers regarding the issue that you’re seeing.
So basically, a movable component cannot have static children so when the mesh is changed to be static, it’ll automatically alter the parent’s mobility. You should see a notification in the lower right corner when this happens too. Also, a static parent component can have movable children. So, when you change it back to movable it does nothing to the root component. This will cause your actor to be unable to move, because the root is still set to static.
This technically isn’t a bug within the editor however, it’s something that we feel should be more noticeable of the changes, besides just the quick notification that pops up and vanishes. With that being said, I have submitted a feature request to have something extra added in that’ll make it more noticeable that these changes have happened.
The feature request is UE-14651 if you need to reference this in the future.
Cheers!