This is a bug with token (mostly buffed tokens but not always) interactions (destruction, returning back to hand) soft locking the game, causing you to quit the current match manually.
Game froze during the coalition game “Rise of Adventure” event on 02/07/2021
The bug has already been described by players on the official MTG PQ forums in multiple topics:
https://forums.505go.com/discussion/84475/tokens-hang-games
https://forums.505go.com/discussion/84469/goat-tokens
https://forums.505go.com/discussion/84326/teferi-hero-of-dominarias-first-ability-causing-freeze-lockup-investigating
This is the situation.
- Game freeze during the coalition game “Rise of Adventure” event on 02/07/2021
Here is the card interaction that caused the trouble.
Vicious Wolf token CREATED AND BUFFED by “Garruk, Cursed Huntsman”'s 3rd ability “Cursed Predation”
Destroyed by card
“Hagra mauling” in the LANDFORMING mode
Primary effect of “Hagra mauling” triggered successfully but the secondary effect (summoning of the land token) didn’t trigger and game went into the soft lock mode. The secondary “effect swirl” is still rotating. At this point there is no choice but to quit the game manually.
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This bug happened many additional times with other cards. That interact with tokens. This is Training grounds.
Planeswalker: Teferi, Master of Time
Casting “Unsubstantiate” on the token created by “Militant Angel” caused the same soft lock effect. -
Another instance. Awakened Inferno event. Node 2: Acolyte of Flame (left)
Planeswalker: Teferi, Master of Time
Casting “Stern Dismissal” on the token created by the permanent support, “Fleeting Elemental”, caused the same soft lock effect again.
Please make fixing this problem the first priority. Thank you.