Comment 8 for bug 1971932

It's rsync! The new version does not like to work with the old one.
I had the same problems. After I upgraded my Ubuntu server (running VMs) from LTS 20.04 to LTS 22.4.1. Since then the backups using rsync of the VMs (max file size 6.2 GB) to the backup server (Debian 10) failed. Intern (within the Ubuntu file tree) rsync still works fine.
The rsync error always occurred at the large file (max 6.2 Gb).

Ubuntu 22.04: apt-cache policy rsync
Installed: 3.2.3-8ubuntu3
Candidate: 3.2.3-8ubuntu3
Version table:
*** 3.2.3-8ubuntu3 500

Debian 10: apt-cache policy rsync
Installed: 3.1.3-6
Candidate: 3.1.3-6
Version table:
*** 3.1.3-6 500

After I upgraded my Debian from 10 (buster) to 11 (bullseye) I had a new version for rsync:
apt-cache policy rsync
rsync:
  Installed: 3.2.3-4+deb11u1
  Candidate: 3.2.3-4+deb11u1
  Version table:
 *** 3.2.3-4+deb11u1 500

... tadaa, and it worked