TrueNas: Active side: cannot receive incremental stream

Truenas to Truenas Backup. Both Dragonfish-24.04.1.1.

Backup/replicationtask works multiple time and then suddenly:

"Active side: cannot receive incremental stream: most recent snapshot of --Dataset name--  does not
match incremental source."

Only solution I found until now → delete back up (Dataset) on receiving side and start the replication task again.
I could not discover any pattern, happens for different datasets at different times.

Anybody facing similar or has an idea where to look?

Cheers