Non-empty mana pool ask wrongly player on turn control under another player (hold table hostage)?

From [reddit](https://www.reddit.com/r/XMage/comments/1denz4t/report_a_player/):

> After I finished my turn, at the beginning of his turn, the effect of emrakul started. I started turning the mana (before the draw). After that, I tried to move on to the next step, but what I mentioned happened, I tried a few times and couldn't continue. I decided to wait to see if it was really him holding it down (I thought: "Well, if he's holding down a button, I can give it a few minutes and while he's distracted, I'll continue). And it was as I thought. I waited for about a minute , so I tried to follow again, the message about mana appeared and didn't disappear immediately, I was able to click to continue, however, there were still 3 or 4 lands standing, I soon clicked to turn the lands, then everything happened again but this time. I didn't have time to wait anymore

If you add mana to mana pool then game will try to confirm before move to next step. But if player under control of another player then it must ask real turn controller, not pool owner.

Need to confirm is it really happen.