Bet365 will throw you out after placing a bet.

[lamantin]

The same works in Chrome. Again I suspect an update bug, because it worked in Vivaldi for a while. There are JS bugs in Vivaldi.

[DoctorG]

@lamantin Please check Troubleshooting issues.

[lamantin]

10 Found a bug? Oh, Yes!
Should I reinstall the whole thing again? Chrome is constantly updated, no bugs yet.

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Creating a new Vivaldi profile did not fix it.
C:\Users\[USERNAME]\AppData\Local\Vivaldi\User Data\Default