Left-hand navigation sometimes jumpy

[imchairmanm]

Hey there. So I apologize in advance, but this is a bit of a frustrating issue to make because I can't pinpoint when exactly it happens for me.

To describe the situation, sometimes the left navigation section jumps around for me unexpectedly and blinks in and out occasionally as if it's being re-rendered. I can't reproduce at the moment, but wanted to note it in case there are other reports that match this. I'll make note of what I'm doing, etc. next time I see it happen.