When filetering on the comment status (e.g. "None", "Accepted", "Completed", etc.), if I set the filter to "None" and then change the status of a comment, the comment stays visible.
This is undertandable as having the comment automatically disappear may be disconcerting to some users. However, there is also no way to manually "refresh" the filter. The "Apply" button is disabled unless the user changes the filter.
The only workaround is to change the filter, click Apply, then change it back, and click Apply again. This is painful.