XnView Ver 1.4.3 Cut Selection invert randomly on TIFF files

[SandUhrGucker]

1st thank you for this great piece of software (!)

I found a strange bug in XnView:
Task is to mask, cut & save 300 Images.
On JPG & PNG this works fine, on TIFF Files the selection invert randomly after some files.

System:
Windows 10
XnView Ver 1.4.3 64bits (Feb 25 2023)
ffmpeg version N-111383-g20b8688092-20230709
built with gcc 13.1.0 (crosstool-NG 1.25.0.196_227d99d)

Here you can see the problem: https://youtu.be/vOrSGxMITq8

Regards,
Rene´

[xnview]

could you send me a TIFF sample?