Hello,
from time to time we encounter some slight issues with forms and fileds apparently popping out of nowhere (see attachment). Can you see the white field near the bottom of the form? There's absolutely no sign of it in the developer, and indeed when debugging within the developer everything goes fine. The problem arises when we publish the solution on the server.
Do you have any idea why this could be happening? I don't really know what more to do...
EDIT: I solved by un-extending and re-extending parent form. Still don't know the first cause though...