I’ve been having issues with this on https://caddy.community for the past while.
It seems to happen when the selection crosses the boundary of HTML elements.
For example, if I select text that is totally contained within its own <p> with no <code> elements, it works fine, but as soon as I start also selecting the <code> bit, it doesn’t show the Quote button.
If I select a whole header (see any help post on the forums, which use a template for OP, with headers) then quote appears, but if selecting a header line plus the next line which is a <p>, then there’s no quote.
I’m not certain this is the cause, but it seems to be. This all used to work before, I could select anything I wanted to quote it. It’s been broken for idk, maybe a month? Hard to say when it started being a problem. We’re using 2.6.0.beta5 right now.
Firefox on Linux, Android and Windows.