The attached file contains a textframe anchored to a paragraph containing a form containing two controls, a textbox and a button, both anchored to the textframe
If I drag the textframe anchoring it to another paragraph, the controls and the contained form maintain their positions with respect to the textFrame
But when I undo (Menu-Modify-Undo) for try to bring the textframe back to its previous position, the two contained controls disappear.
Restoring (Menu-Modify-Redo) does NOT make the controls visible.
However, the two controls remain visible in the form navigator, with the related control properties window
Sometimes, but not always, changing the anchor of the controls (using form navigator) multiple times (for example switching the anchor of the control to paragraph and then restoring it to the frame) and the position the textbox reappears, but not for the button it seems almost impossible.
It didn’t help to bring the two controls to the foreground or protect their position
What does this situation depend on?
textFrame.odt (10.9 KB)
Edit: libreoffice 220.127.116.11 Ubuntu 16.04 LTS