One thing that's continually frustrated me when using Sonar is that when I'm doing a lot of operations with the mouse, the pointer has the tendency to stick or lag sometimes. It seems to happen most when moving it across GUI elements, anything that causes the computer to think. I also notice this in other software, for instance in my browser, but it's always been worse when working in programs with big complicated interfaces, like Sonar. I'd always put it down to either a faulty mouse, or bad mouse drivers, or even that the surface I use my mouse on wasn't ideal (and to that end I've been through multiple mouse pads and even just using the desk surface on its own).
Well tonight I decided to look into it a bit more and came across a forum post in which someone talked about their wireless mouse (the same as mine, a Logitech MX Anywhere) using the 2.4 GHz frequency, same as their wireless router. He said that what worked for him was going into his wireless router settings and changing the channel that the wireless network utilizes. So I did a search on how to get into my router settings, and lo and behold there is an option to set the channel for 2.4 GHz (mine also has 5GHz but I left that). Most routers will have this set to "auto," so I changed mine to "2" instead (to pick a random number).
I'd still like to give it 24 hours before making a definite conclusive statement, but I have to say that I've been messing around for an hour and my mouse hasn't lagged or stuck once. That would seem to suggest that the problem was being caused by my wireless router interfering with my wireless Logitech mouse. Other's mileage may vary (perhaps your sticking problem has a different cause, or perhaps selecting a different channel would work for you).
Anyway I'm just putting this out there as a possibility because so far it's giving me a much smoother, more satisfying Sonar experience mouse-wise. I'm pretty excited about this!