Tool bar arrangement changes from start to start (Linux version)

On a fresh installation the toolbars are nice in one “line”:


After starting Sheetcam for the second time it looks so:

Third time:

4th time:

Furthermore a manual arrangement does not make any effect.

Trying a workaround to create a custom toolbar with some of the most needed buttons doesn’t work either. The custom toolbar is also being cut:

Running SheetCam TND dev 7.1.35 on Debian Bookwom.