incremental send stream requires large-block

[thankph]

I have a setup with three machines. One machine I'll refer to as the sender, and two other machine are the receivers. The sender frequently sends incremental snapshots to both receivers. I upgraded one of the receiving hosts to openzfs 2.1.1 and after a week with no issues, upgraded the second receiver to version 2.1.1, which is where I started experiencing a problem sending incremental snapshosts on some datasets.

When sending to one of the receivers, I get the following error when sending incremental snapshosts:

cannot receive incremental stream: incremental send stream requires -L (--large-block), to match previous receive.

The recordsize for the dataset in question is 1M on all three hosts.

The receiving zpool with no issues is reporting the large_blocks feature as 'enabled' as opposed to 'active', where incremental sends for some datasets are failing. Could this be the problem?

I don't want to lose any data, read that there are some issues with using the -L flag. Any ideas? Thanks.