Does the “Bag System” get attached to the PlayerState as a child actor? In that case, by default it will inherit parent’s relevancy. And thus you need to adjust replication settings in the PlayerState class in order to have effect on the Bag System.
Your PlayerState Net Update Frequency is 1, it will attempt replication once per second (still may not do it if bandwidth is saturated). Depending on the number of other replicated actors and their settings, you may also try to increase Net Priority.