No, of course not. I do have the ‘continue running background apps’ option disabled, but I already tried it both ways and it made no difference.
Either way if it works fine on your end I guess I should try resetting all settings and see how it goes. I’ll report back when I will have tried it.
Right, resetting the browser settings would also wipe cookies so I decided against it. I did try a few things with a fresh browser profile and managed to find the cause of the issue, I think. It depends whether or not the search engine in question is set as the default search engine. As long as it is, any changes made to it after the fact will rollback upon restart.