Wow thanks, that was really helpful.
I disabled DoH and now it seems to work. I did never hear of it to be honest. Sometimes to only need the search term.
In fact I guess/hope this also solves another long lasting issue which I add with chrome not realiable connecting to my home assistant instance.
For other users that face the same issue:
Go to chrome://flags/#dns-over-https and disable Secure DNS lookups