User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36
Build Identifier: LibreOffice 18.104.22.168
Since 5.0 it happens
Steps to Reproduce:
1. Open LO Impress
2. Click on side panel "slide backforunds"
3. All backgrounds do not have preview thumbnail
-> 4. We resize size of side panel - they are rendered
[Information automatically included from LibreOffice]
[Information guessed from browser]
OS: Windows (All)
OS is 64bit: no
Reset User Profile?No
Closing as dupe, but thank you for the new information about resizing!
*** This bug has been marked as a duplicate of bug 94370 ***