Maximum number of master servers in a multi-source replication

Hello Friends,
Recently I deployed a multi-source replication scheme with over 100 master servers against a single slave. I had no problem with the setup despite, according to the documentation ( the maximum number of nodes was 64.
I was wondering whether this limit was expanded in recent releases, but I could not find any further mention to it in the release notes.
However, I am having some spurious replication issues. For example, there are missing rows in the slave database. These missing rows come from random master servers. I would like to confirm with you that the limit of 64 servers was in fact expanded in version 10.1.22 (or prior) of MariaDB, running on a 64-bit Centos, so I can discard this as a possible cause for the problem we are experiencing.
I appreciate very much your time and help with this issue.