Breakout room Participant distribution problem

[MR1203]

After running the breakout room several times, the assigned participants' rooms may change.

For example, it has the following form.

Assign Mr. A to room ① and start breakout room

↓

Breakout room end

Checking the breakout room screen, Mr. A is moving from ① to ②

We allow movement between breakout rooms, but it's puzzling because it's not a situational situation.

If anyone knows anything, please let me know.