Replication reset to "No snapshots sent yet" since update to FreeNAS-11.3-U4.1

[shnurov]

We have a 15.5TB dataset that needs to be replicated to an off-site location.
Unfortunately, that dataset was unable to synchronize for over 2 weeks due to DDNS and internet stability issues on the PULL side.

500GB of new data was finally pushed over a 20mbit connection (3.5 days), but the setup still showed:

Code:

Sending 1 of 61: snapshot-20200721.1000-2w (506.92 GB / 33.42 TB)

After updating PULL to 11.3-U4.1 - it became

Code:

Sending 1 of 62: tank/dataset@auto-20200804.0907-2w (8.86 GB / 34.08 TB)

With the latest Snapshot sent being "snapshot-20200721.1000-2w"

After updating to 11.3-U4.1 on the PUSH side - the replication restarted.
The field of 'Last Snapshot' sent became "No snapshots sent yet
Progress of Running shows:

Code:

0.03%
Sending 1 of 64: tank/dataset@auto-20200804.0907-2w (273.82 GB / 17.03 TB)

The PULL FreeNAS box shows usage of 15.22TB.
The PUSH FreeNAS box shows usage of 15.53TB

Any ideas of what could have happened and whether the situation will be resolved once the PULL hits 15.53TB?