When switching from timeline to audio, program locks up.

This happens 100% of the time. If I am editing something on the timeline and I have two windows up (one is audio and the other is the timeline footage), and I hop to audio and attempt to scrub (move the mouse over the "arrow" (see screenshot) - the icon with the dot and triangles on either side) - it doesn't do anything for a second.
The program doesn't freeze, in the sense that the screen doesn't go white (which DOES happen when the program locks up) but it doesn't respond. Then....maybe 3 seconds later it lets me scrub the audio. It works fine if I stay there. but if I move from timeline back to that window....pause.
Is this a known issue? Anyone else experiencing this?
The program doesn't freeze, in the sense that the screen doesn't go white (which DOES happen when the program locks up) but it doesn't respond. Then....maybe 3 seconds later it lets me scrub the audio. It works fine if I stay there. but if I move from timeline back to that window....pause.
Is this a known issue? Anyone else experiencing this?