Well, I guess it is inconsistent, though I see it happen often enough.
Trying to repro today, it is working better than yesterday.
I'm not using dark.
I see it mostly when list buffers is docked - but typically if it isn't docked it is only open briefly, then closes.
For me the current item does update after a second or so after making a change.
Seems to un-highlight immediately on save.
Hmmm... I just reproed.
I have 20-30 files open.
I have 2 untitled buffers with text.
I modified 4 other files.
The current item is modified.
Then save-all.
The current item refreshed - unhighlighted.
The other 3 files that were modified are still highlighted.
The 2 untitled buffers remained highlighted as expected.
Now, list-buffers is in this bad state of not refreshing - even the current item when I save no longer refreshes.