Using [ConditonalField] causes Editor Button to be drawn twice

[SwingWren]

I'm having an issue that a button gets drawn twice after adding the Conditional field attribute. Code in my custom property drawer:

Should I do something different in my code?

[Deadcows]

Weird! Is the button drawn through the property drawer for ITeleportExtraSetupData, or is it CustomDrawer for MB this field is in? I'll try to reproduce this behaviour and figure out the problem 🤔

[SwingWren]

The button is drawn through the property drawer ITeleportExtraSetupData. Here is a minimal demo project. mybox-conditional-drawing.zip