Is the workboard set to sort by priority when you are doing this?

Can you provide more details on how we can reproduce this bug? Do you have sorting set to Priority, for example? If sort is set to Priority, dragging cards will alter priority.

Workboards are slow at Dropbox is being tracked in T7664 and T8588.

Ah! Thank you. You can close this -- it's just user error. I had no idea that moving tasks when the work board is sorted by priority would change priorities.

Would you classify it as surprising? T8135: drag & drop on a workboard sorted by priority behavior is surprising

Yeah, definitely surprising. I don't mind the behavior at all -- in fact, now that I know it exists, I'll probably use it intentionally. But I'm not sure how I would have known that it was intended behavior. Maybe if I was more observant and had realized that the new priority was chosen based on its location and the priority of other tags, but I feel like the UI here wasn't really discoverable.

Hmm... This IS funny. This generally is/should be some kind of desired behaviour, but is less discoverable, because other tools don't have it, right?

So the behaviour is surprising, but generally desired, right?

That's the case for me. I like the behavior.

I think part of the UI problem for me was that I selected one thing (sort columns by priority order) and it also did something that (to me) was entirely different: change priority of tasks when moved. If I had selected an option to do that, I wouldn't be surprised, but I'm used to resorting displays by various different parameters and having this not affect anything other than display. It was surprising to have the sort order affect functionality.