Well I don’t expect the behavior you’re seeing. I will say TRIGGERED_MODIFY is the most unusual of actions because it does not induce any new states (STOPPING, STOPPING_ERROR, ERROR, etc.). It is also the newest of all the actions, so it doesn’t have as much mileage.
I’ll modify my tests to do a short PT move (instead of continuous), to be more consistent with what you’re seeing.
In the meantime, if you are needing to get the feature release, I would suggest considering an action other than TRIGGERED_MODIFY for this case.