Topic stats bar doesn't update repliers automatically

Just noticed this here on meta a few seconds ago:

As the most recent replier, I’d expect to see my avatar appear in the stats bar immediately; the “last reply” and number of replies updates automatically.

It also looks like the number of likes doesn’t update automatically.

I’d imagine that this should be more all-or-nothing than it is at present…?

This was and is not meant to update live so this would be a feature req.