I've worked with lots of variants, and by far I find using both works best: feature/PROJ-124-user-edit or bug/PROJ-234-startup-crash
This unambiguously lets you trace back to the ticket (as either the author or owner), but keeps the branch readable (you don't have to go to the ticket to see what it is). It also makes the merge message (containing the branch name) much more useful when looking back months later.
It works with multiple branches per ticket (which I often do to make PRs easier): feature/PROJ-456-refactor-config,
feature/PROJ-456-config-ui
It avoids having to worry about the text name. There's no worry about duplicates, either current or historically. It can also be short: just descriptive enough so someone looking at the branch list can see what's what, and you can find yours without memorizing ticket numbers.
The ticket is also very useful when you're cleaning up old branches: maybe there was a different fix and this was abandoned, or maybe it was blocked and then forgotten? The ticket can answer that.
It's very low effort: you naturally know the ticket when creating the branch. After that, you just work on the code, and when you're done the ticket number is right there for you - no searching, sticky notes or kanban board necessary.
Edit: the bug/ or feature/ prefix is optional, but keeps the display way nicer: most UIs will treat it like a folder and allow to collapse, keeping the top level organized and tiny. The classification is also easy and useful - at a glance you can see if it's mostly fixes or new features happening (without looking at your issue tracker). For products with released versions, release/1.0, release/1.1 etc works well for the same reason.