This logic assumes that, if a command receives a stale error of a namespace different from that of the issued command, then it has to be a timeseries collection. This logic then invalidates the entry in the catalog cache for _nss with the information of a different namespace. If this assumption is incorrect, possibly due to an inconsistency caused by a different bug (see SERVER-82085) then this could lead to a time monotonicity violation when refreshing the cache.