sorry, I lost already a lot of time, so I am a but behind with everything now. I can’t investigate much myself now, if you say the feature is actually stable then it’s perhaps really on my end, even though I would wonder how…
Mostly those are small site, some tiny sites where I just have an empty test install with a specific theme I wanted to migrate. Size can’t be the issue here.
Running an macOS latest Version Mojave. The old Laptop is an Intel processor (MB Pro 2019), the new one is an Apple processer with M2 chip. Both have had the same issues. So macOS or MacBook could be an issue here, I couldn’t test on a Windows machine.
In the end I managed it with many attempts, didn’t test though if all of the migrations (backup/restore) worked, therefore I will only delete the sites from the source laptop when I am sure they are able to run.
While it’s fine for me now as it is, it is 100% unreliable for me unfortunately and takes for ages to run through the process.
So I definitely should try to get into investigation (or hope that some bugs, issues are just solved by itself with the further development)