Q:
[Bug] 'Stop the jotun from stealing back...'
It’s useful to describe how the event is buggy, even if it’s just “NPC is stuck” or “no enemy spawns but at 17 percent done” or whatever.
It’s also generally better to use the in-game /bug command (or the menu) to report it: that includes a bunch of hidden technical details (like what shard you are connected to, which server, etc) that can help anet track down the issue and fix it.
You can also mark that as “blocking progress” which helps them understand how often this sort of thing is just annoying (eg: stuck event sucks, but whatever) vs actually stopping people getting things done (eg: stuck event prevents completion of achievement, daily, etc.)