app crashes if sorting table

[schnaggi]

Version, Operative system
windows 10 22h2
cherrytree 0.99.55 from portableapps.com

Describe the bug
app crashes after sorting table's rows

To Reproduce
If applicable, attach a non-personal document where the issue can be reproduced systematically.
Steps to reproduce the behavior:
I created a node and a table in it, I filled the table with some data but not all cells are filled. Now I sort the table's rows.
In the crashfile the app hangs, in my "productive" file the file crashes.

Screenshots
If applicable, add screenshots to help explain your problem.
crashtest.zip

[giuspen]

I can reproduce, thanks for reporting I'll sort it out shortly

[giuspen]

Will be fixed in 0.99.56