The ones a little bit annoying, I wonder if it is specific to me, can anybody repro please?
Project Steps in X3d:
 
1) New project
2) Drag in an audio loop creating an audio track.
3) Press J multiple times
 
Observe - Now you cannot get rid of the speaker icon next to the mouse pointer.
 
Also try following the steps again with a large project. Then try scrubbing for about a minute, make sure you scrub tracks as well as the timeline. Press J a few more times.... After a minute or so the Sonar may crash. Feels like something leaky is going on here...

So I think the stability issue was at my end as I noticed the Z3TA+2 seemed to be crashing a lot, I renamed AUD.INI, did a plugin reset and all is fine so far (famous last words).
 
Back to the scrub tool, The workaround is pressing F5 and then it will go away, it seems to work for a toggle for a while and then it just stops behaving that way until you press F5. I can't see how this would be by design?

So the 3 steps above still persist for me...
 
Thanks..

I think it's working as intended, but is not well-documented. Clicking J briefly locks it on until you deliberately change to another tool. Holding J for more than a moment activates it for only as long as you continue to hold it, reverting to the previous tool when you release it.
 
I couldn't replicate a crash.

Thanks, I guess this is just me. From my perspective if there isn't a dedicated button for it (which I find quite strange) it should be a toggle. I've got a feeling there should be a button for it in the tools module but for some reason it never happened!
 
Thanks...