I don’t have repro but have been seeing a lot of “slow updates” generally. None of them involved emails, but the symptoms are similar: I drop an item into a parent and it doesn’t appear right away in a Pane which should include all children of that parent. Sometimes it happens when creating a mirror/link. I’ve been experimenting with GB panes a lot recently so that might be a factor.
Generally the moves do actually happen, there’s just no feedback. Changing Pane focus doesn’t seem to fix it – must switch away to a different Board to get an update. In all my time using Legend it has always been quite responsive – you make a change and all repercussions are immediately visible. That’s critical for new users learning, but frankly even with some experience it’s easy to get confused when the feedback loop is busted.
I’ve also noted in some panes (pretty sure only GB types) I will get the “filtered out” dashed lines around some or all items for no apparent reason. On mouseover or arrow key. This is not the result of any actual change, just mouseover. The items should not be hidden, and never do actually hide. But Legend seems to be chasing its tail a bit and maybe that’s part of the slowdown.