MetaJess

Every time the you can't untag people in threads bug comes up I have to re-explain to people that yes many things that look almost identical to it work, it's just this one really specific thing that @Twitter have arbitrarily decided should be broken when everything like it works.

So for example when I tag @jack into this thread like this, he is automatically tagged in to the rest of the thread, and none of the main Twitter clients let me untag him.

This is because replying to yourself to continue a thread has a completely different UI to replying to other people. When *you* reply to this thread, it's easy for you to untag @jack, but I can't do so.

This is true regardless of who I tag in when in the thread. If I were to casually mention @TwitterSupport in the middle of this thread like this just because they had something useful to say (unlikely) then they're stuck hearing all the rest of this thread. Terrible shame.

Fortunately there is, for now, a workaround, which is that https://tweetdeck.twitter.com  treats threading more like normal replies. It seems to be getting gradually worse so I don't know how long it will keep working - you have to click through a bunch of things to do it.