Mute and solo still work via console however. Anyone else seeing this issue?

Not seen that.  Is it a particular project?

Nope. Happens on all existing tracks now.

Update: I got it to work. Before the update I could place the point of the cursor anywhere on the mute or solo icon in track view and it would function as expected. Now I have to place the point of the cursor on the very bottom of the icons and it works. In the console view these icons work with cursor placed anywhere on the icon per usual. Not a big deal just kind of curious. All is good!

Btw, in track view when I place the cursor in the center of the icon the cursor changes to the image that allows you to increase the size of the track by dragging downward.

Great update Btw!!

I have not seen that and  I have spent a few hours today with the update on my Surface.

I just tried mine and everything works as it did before.

Yep I have the same problem, some times putting the cursor at the bottom of the button works and sometimes no bueno...  I do use a HUGE pointer so maybe thats part of it?  I need a colored small pointer perhaps...  update, pointer makes no difference.
If i resize the tracks, touching the lowest edge of buttons etc, it works, if tracks are fully minimized, no go.

I haven't see that problem with Sonar using track view today, however,  there was a posting  HERE about a problem with the mouse pointer after the new update,  I didn't have that problem either.

Anyone with problems using X-Mouse? Their latest update is screwy with Sonar.

I see this too when using folders & it also affects the strip size bottons, after dragging the strips larger the stripknobs work as expected from what I´ve seen so far.
Only the + seems to work on the folders.
After dragging the stripsize larger, everything inside the strips seems to work ok.
I submitted a problem report of course.
 
Reverting to 2017.04 solved the issue.
 
Apart from this issue the 2017.05 update is excellent from my perspective, BIG thumbs up, the Limiter is just WOW!!! :)