Your WiFi passphrase is a passphrase not a key so entering it over and over won't achieve anything. This is probably something related to crypto in the kernel and the change to IWD. At the moment "it's a known problem" but how to triage/diagnose the issue is not known and there is no solution. To be continued..
So you don't know either ?
Well, it seems that's only me who got this problem, because nobody else complained about this "serious flaw" here on this Board.
But if it's a "know problem" why was Version 11.0.0 released with it ?
Was this Version never tested ?
I think a lot of people use WLAN with their LibreELEC, and all would be very disapointed if it's not working in the new Version.
Well, the old saying "Never change a running System" seems to be true,
Luckily the USB-Stick with Version 11.0.0 was only for testing and I will revert back to Version 10.0.4 on the Stick.
For daily use I've kept my SSD with Version 9.2.6 for PC and my SD-Card with Version 9.2.8 for my Pi3 which both never gave me any Trouble.