Using gimp version 2.2.13-1ubuntu4.3 I was able to reproduce the bug. After I installed the version 2.2.13-1ubuntu4.4 in -proposed I was able to save non-corrupt PSD files.
Using gimp version 2.2.13-1ubuntu4.3 I was able to reproduce the bug. After I installed the version 2.2.13-1ubuntu4.4 in -proposed I was able to save non-corrupt PSD files.