"Duplicate" created by a Shifting Scroll locks the game

[BigHugger-2468]

This is included in the known issues topic, May 22 update.

Known Issues List 2019 - Updated Dec 12th

May 21st, 2019 Bartender Bob may sometime display an empty dialog bubble when leaving a Friendly Encounter. When using the “Gangs All Here” effect on a buffed minion in a Friendly Encounter, the animation improperly shows increased stats. Duplatransmogrifier will delete all minions in your deck if you select a minion that was buffed by a Friendly Encounter card. Duplatransmogrifier will modify your deck when played by the AI. Elixir of Vigor causes minions that trigger off a "next" cast to be …

Until this is fixed, you can work around the issue by a quick force-quit of the game (Alt-F4), restart, and then after the game reconnects you can continue.