Sometimes I open a file or scroll to the top or bottom of a file and nothing is colored/highlighted. I find moving the cursor up and down through the lines fixes each line. I also find cases where a syntax problem has a squiggly red underline, I solve the issue, and the red line persists when it should go away. Forcing a redraw by moving the cursor fixes it.
Is there some way to get CFB to be more aggressive about redrawing without me doing so manually?