After JMC-7004 fix, the up and down arrow keys started working but the functionality/selection is not proper. For ex: if I press up arrow sometimes it selects the next upward row properly, sometimes it skips 1 or 2 rows while selecting. Same is for the down arrow key also. The issue is intermittent but its mostly visible when stacktrace pane is reduced in height a bit and graph is given more space to render.

Edit: (apmtac): this looks to happen if the entire chart (height-wise) is viewable in the ui, which may happen due to high resolution or a small number of threads. I'll poke around more when I have spare cycles, it's probably not calculating the bounds of the lanes correctly.