Pausing only works sometimes.

Sometimes when I pause the game (Bedrock, obviously, as pausing is a brand new feature for us), it works, and in the bottom-right of the menu it says “game is paused.” But sometimes when I pause, the game does NOT pause, and the menu does NOT read “game is paused.” I figured it's just because this feature is new and therefore buggy. I haven’t really noticed a pattern, it just seems that sometimes it works and sometimes it does not. Is it possible that it has to do with WIFI connectivity? Can you only pause when connected to a network and receiving service?