It seems MS activated CDC by default in NAV 2018 and did not documented why and if it's necessary. Couldn't find anything regarding this. According to Microsoft's CDC article, it is recommended to also activate SNAPSHOT_ISOLATION with CDC, which happens not to be active in NAV 2018 CRONUS databases.
What's the deal?
Reason why I am asking, a client of ours get sporadic Severity 16 warnings saying the automatic cleanup got blocked because of table xyz (different tables).