Extra Turns Not Stacking Properly
I used Emrakul, the Promised End to control my opponent's next turn, and then they got an extra normal turn afterward. During their mind controlled turn, I had them cast Time Warp on me. According to CR 500.7, the most recently created extra should be taken first; however, Arena had my opponent take their Emrakul extra turn first.
Windows 11 Home, 64 bit
See 17Lands replay here (turn 13): https://www.17lands.com/history/b1cec87f451c490688ff24e8e74573e8/1/0

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ilovebraisedmeats#57802 commented
I took control of my opponent with Emrakul, the Promised End and cast their Time Warp, targeting myself. When passing their turn for them, however, they got to untap and take their extra turn from Emrakul. According to rule 500.7, the most recently created turn is the next one that is taken, so it should go from the "mindslaved" turn straight into my own extra turn, then my opponent takes their Emrakul extra turn after.
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ilovebraisedmeats#57802 commented
Just happened to me, too, and cost me a match on the ranked ladder.