Things disappear when set to fill component

So if I have say 3 buttons in a row and set them all to fill component, then the row disappears. Why?

They don’t disappear, but may by they are not filled by any text or background picture so no content, therefore you can not see them

I think that’s what happened with you.

They have text. Also happens with labels and textboxes. I say 'disappear" because they cannot be seen. However if you change 1 to fill contents they all reappear.

I’m also having this problem.

I set the buttons as you wrote. Nothing disappears from me.

%D0%B8%D0%B7%D0%BE%D0%B1%D1%80%D0%B0%D0%B6%D0%B5%D0%BD%D0%B8%D0%B5

yes this also happens to me sometimes but I chance one of them to % size and they all appear