Screen scrollable in textbox gotfocus block cause family issue

i have a textbox gotfocus event.

It is cause something with parents and childs if i touch the textbox.
What did i messed up again?

I can repeat this if I have a LostFocus event for the same textbox. If I use a GotFocus for another textbox to set screen scrollable to false then I do not have a problem. This looks like a bug, and I have possibly found a workaround in the meantime....

Yes. I have just finished the lostfocus test. I have no other textboxes, but i can set the screen scrollable on arrangement change, so can be worked around. Thank you.