Reclaiming space not working, disk image increases by 3 fold [v4.0.3]

[LostInCompilation]

Describe the issue
When reclaiming disk space of a VM, the size of the disk image suddenly increases by a lot. For example I have a small Debian image with about 600MB. After reclaiming its size was 2GB. Same with another Linux VM with 6GB before. After reclaiming it had 16GB.
The same is happening with reclaim and compress, however that seems to be caused only by reclaim. Compress then also doesn't decrease the size.

I tested it with the same VMs as with version 3. V3 worked without a problem and reclaimed the space successfully.

Configuration

• UTM Version: 4.0.3
• macOS Version: macOS 11.5.1
• Mac Chip (Intel, M1, ...): M1 Pro