Das steht auch so im Bug-Thread seit Ende Oktober:
[Edited 10/30] [General] The team is investigating reports of the reconnect sometimes not working as expected and instead leading to concessions. Reports are indicating that closing the client by pressing alt-f4 or the close button in the corner
(or swiping the app away on mobile)
work fine and that the issue is ONLY when closing the client by pressing Escape or clicking the Gear button to go to the quit button.
Der Workaround auf dem Handy wäre also die App wegwischen, um einen Loss zu vermeiden.
Quelle:
Das hatte VBrainstone übrigens auch schon damals hier im deutschen Forum gepostet, fleißig wie immer!