Random Disconnections
The past few games that I've conceded, when clicking the Concede button, I get disconnected from the match. I have to reconnect to the client or force close and reopen it.
Additionally, certain games will simply disconnect me for no reason. This did not happened to me before the M20 patch.

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Hello,
It sounds like you may need some more troubleshooting advice, please submit at: https://mtgarena-support.wizards.com/hc/en-us/requests/new and select 'Technical Troubleshooting'.
Thanks!
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Damens#65696 commented
I keep loosing connection to the game while playing or in the home screen. I do get instantly reconnected but it is still annoying. Is this a known problem? It happens basically every ten minutes or so.