True, though I had once a fight in Arena against Edo Minato that recovered from Immobile at the end of round 1, despite the fact Kurenai used her mystery after his standard. On different game, it worked as intended so I dunno what is happening.

In general I think immobile, Chaos and Sleep effects are unreliable, I had many battles where they didn't do a thing as they were applied after target's standard attack in Round 1 and stoppd working before standard in round 2. I don't now if it is due to some bugs or *a hidden mechanics.