If multiple controllers transition out of a state with particle effects at the same time, only the last particle effect will stop playing

Partner Rank: 2 (Important)

Verification Builds: 1.21.40, 1.21.50

Regression Builds: -

Summary: If multiple controllers that are playing particle effects transition out of a state at the same time, only particle effects from the last evaluated controller will stop, the rest will continue playing.

Affects currently Live Content: No

Impact: While we've been able to catch this one during development and implement a workaround ("rotating" between controllers that are allowed to transition), this kind of issue is something that you expect to "just work", and I suspect that there is live content out there which is affected by this in some way.

Repro Steps:

1. Create a new world with attached add-on and enabled cheats
2. Run /summon example:bug command in chat
3. Take a few steps back (at least 3 blocks)

Observed Results: Blue particle effect stops while red and green keep playing

Expected Results: All 3 particle effects will stop, since their controllers transition at the same time, based on the same condition (if distance to camera is greater than 3)

Screenshots/Videos attached: Yes, video included

Notes: -