SLES 15 only start good in recover mode

I have three SLES 15 SP5 latest patches, I migrated them fom ESXi 6.5 to PROXOX 8.1
Two of them starts fine and runs fine, the third one looks for a remote filesystem, but when I select option and select the recover the system boots fine and every runs well.
Thats OK for a manual start but not for automatic start in a virtualized enviorment. Tried different SCSI drivers no change. Search a solution for more than a day at Google etc.

Thanks for any hint or help

the datastore for all three is ZFS
Migrated some Debian machines too, no problem