My gripe for the text editor—if you navigate away from the page, by an accidental click or keypress, all your text is lost. This kind of thing was solved 15 years ago; it's table stakes!
This results in a fun game of me trying out single backticks, triple backticks, braces, double braces, other miscellaneous punctuation symbols, and various indents before giving up and trying the formatting toolbar, only to waste another couple of minutes clicking around to see what works.
Somehow I can never remember what worked either, so I find myself repeating this ridiculous dance on at least a weekly basis.
Although IIRC, there was a recent update that at least harmonised the code formatting syntax between editors, although I can't remember if it actually worked....
I thought I was the only one who is annoyed with this. Not only that, but the editor when you first create the ticket and the one used to later edit it are different too. I can't think of any sane technical reason that might explain using more than one rich text editor.