Close has already been called on the connection

[juliushaertl]

While I thought we had resolved this we still seem to try to close a connection that has already been closed regularly. I'm not sure if this is avoidable, but if not we can maybe handle that more gracefully instead of throwing and erroring out on the console

https://nextcloud-gmbh.sentry.io/share/issue/4eff0f8ac50b49d2a481d35e2f718ab0/

@max-nextcloud Any idea?