Dopplegang copying buried in the garden
Previously I had 2 copies of Buried in the Garden which were exiling 2 separate cards from my opponent.
I then cast Dopplegang with x=2. Targeting each individual Buried in the Garden I owned.
At this point the game froze, then it slowly loaded each copied card, but when it loaded them on the stack the target was already picked for me, and all 4 new token copies of buried in the garden were targeting the same target.
The game froze, then lagged (my opponent had a disguised creature and mana to unmorph it, so it lagged on their response).
Eventually the buried in the gardens resolved, removed 1 permanent, the other 3 copies somehow ended up targeting the same thing. And after further lag the game froze, and then ended in a draw.
1) The game lagged making 4 copies of buried in the garden
2) The game chose the wrong targets for all 4 copies of buried in the garden
3) The game lagged waiting on responses from my opponent
4) The game froze, then crashed, then ended in a draw

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DumasA#03313 commented
This bug is either when doppelgang targets two separate copies of buried in the garden, or x=4 or more with 1 buried in the garden targeted. I've had intense lag and also a game error ending in a draw.
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segoli#54307 commented
I've run into the same issue. I've managed to play a few games with these two cards, and while many of them have gone fine, I've had severe lag a couple times, with one game taking the better part of an hour to complete, during which I was at many points more or less unable to take game actions before the turn timer ran out.
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SZebra#83842 commented
Just finished a game after experiencing the same bug (which potentially lost me the game).