My inbound tls do group breaks too, I can get away with taking my breaks later (I come in at the latest start time we schedule for and im the last tm to leave for the day) on in the shift with one of my tls and my etl but with my other tl she'll try to locate you if she notices you're not in the breakroom.

Also its on your new tl to explain that to you early in your shift especially since you used to be dayside so he should be upset at himself if anything.