Ctrl-click hover highlight doesn't disappear if a line is commented out while highlighted

[gene-pavlovsky]

Steps to reproduce:

1. Select a line of code.
2. Hold Ctrl and hover the mouse over some keyword in that line - keyword's background is highlighted.
3. Still holding Ctrl, press and release Q, commenting out the line.
4. Move the mouse away from that line

Expected results: keyword highlight should disappear when the line is commented out, or at least when the mouse is moved away from that keyword.
Actual results: keyword stays highlighted, or partially highlighted.

[gene-pavlovsky]

Another related (I think) issue I had several times already is that sometimes line uncommented with Ctrl+Q remains colored as a comment, I have to switch documents back-and-forth or comment/uncomment once again.
Т.е. строчку кода раскомментил, а она осталась серой.