When you try to edit tags inline (it often happens with comment tag to me) for an unknown reason although the window is activated whenever i start typing it loses it's focus after 1-2 keystrokes, it exits the inline edit mode and whatever i typed disappears.
Usually this happens if you try to type immaterially when the inline tag edit is activated.
It's actually losing focus even if you don't type anything.
After some testing i think that the problem is happening when "Automatically refresh matching tracks" is enabled on the playlist that the track belongs.
Now that the "Automatically refresh matching tracks" is deselected whenever i try to rate a song the list is flickering and sometimes it jumps to the first song (Top).