AutoDMG fails to unmount sparsevolume on 10.15

[MagerValp]

Description of issue

A sparsevolume is created and the mount path is saved, but the installer splits it into two new volumes, causing unmounting of the original volume to fail.

Expected behavior

Unmount after installer

Actual behavior

Gets stuck on unmounting, giving up after 10 tries.

Steps to reproduce

Run AutoDMG on 10.15 b1.

Log file

catalina.log