Created attachment 76404 [details]
A Draw file that exhibits the flaw
Sometimes shapes are not visualized if you group them. Which shapes are visualized and which not is quite at random.
If you click on the group they are showed for a second (with transparent colors).
If you ungroup them, they are showed correctly. If you group them again they disappear again.
The bug is quite reproducible. Attached you will find an ODG file that exhibits the flaw.
NOTE: The file was originally created with OpenOffice, then opened and saved again with LibreOffice. But this should not be an issue.
Thank you, bye! :)
Operating System: Windows 7
Version: 220.127.116.11 release
Thank you for reporthing thus bug,
I can reproduce this bug running LibreOffice 18.104.22.168.
*** This bug has been marked as a duplicate of bug 62617 ***