Hi there, thanks for the reply. I’ve been using Sam's Simple Theme for years, I don’t think it modifies the logo behaviour. I also use GitHub - discourse/discourse-full-width-component: Make Discourse occupy the full browser width · GitHub. At any rate I managed to work around the quirks with some custom CSS rules, but they no longer work with the latest Discourse ESR. I think the root of the problem is this:
Can you confirm if that behaviour is default?