Emrakul and countering opponent's spells with their own counterspells
Cast Emrakul, controlling their turn. On the turn I controlled them, I cast their Search For Azcanta with priority locked, and attempted to counter it with their own Saw It Comings, but wasn't able to. They had open mana for both but it couldn't seem to register I'd want to counter their own spell. Not sure what part caused the bug, pretty sure I should have been able, so logging in case it's not an isolated incident. (No big deal I was dead anyway and just happy to have Emmy on Arena at last but hopefully this is useful)

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Hello,
For this issue, please submit at: https://mtgarena-support.wizards.com/hc/en-us/requests/new and select 'Report a Problem in your Event'.
Thanks!
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Tel#89799 commented
Had the same issue, and lost a game over it in cube :/
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Quyzyx#71030 commented
Also ran into this issue
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ilGianB#44665 commented
Same