I have 2 cockroachdb clusters (version v19.1.4) - A and B - each with 3 nodes.
When I add a 4th node in cluster A, i start seeing 23 under-replicated ranges - which goes down to 0 when i add a 5th node. My guess is this is expected due to the system/meta ranges having a replication factor of 5.
However when i add a 4th node in cluster B, the admin UI or status command does not report any under-replicated ranges.
Can you please explain why would I be seeing this difference in behavior? Also, How can i confirm that the problem ranges in cluster A are system/meta ranges?