Description:
When i create a note to a cell and I add a picture to it as background, this picture pops up when I hoover over the cell. But when I save and reopen the file, and I hoover over the cell, only a white pop up appears. 
A
I have made a screenshotmovie:
https://www.dropbox.com/s/kb9drulmw7adbvb/rasterafbeelding%20van%20notitie%20onzichtbaar%20-%20Ask%20LibreOffice%20-%20Google%20Chrome%202020-02-14%2014-58-32.mp4?dl=0
This doesn't same to be the case in version 6.2 and older versions of Excel can open it also properly (not excel 365)

Steps to Reproduce:
1.Look at the move in description
2.
3.

Actual Results:
no picture shown in pop up

Expected Results:
same behaviour as before save


Reproducible: Always


User Profile Reset: No



Additional Info:
questions: please mail