Hi,
When I freeze every kerbal in a ship, there only one way tô bring them back... in the menu when in the KSC... So they appear back there, still with the frozen status but able tô be sent in another mission... so they Just "teleport back". Yes, the original ship would be on some far away planet...
Thats somehow interesting... but not the way I would deep freeze mob...
That started after the last KSP update.
ANY TIPS? IDEAS?

Nope sorry. I tried the same, and no issue.
No logs, can't help you.
Please attach the save files and logs.