Yes, Sonar has some bugs. I save often
What's embarrassing is pilot error bugs, like having MIDI notes cut out because I didn't have a big enough MIDI buffer. Or my personal favorite - bouncing clips to make a composite vocal and ending with a clip that had no audio. I finally figured out that having "Mute" enabled on a particular lane while bouncing probably wasn't a good idea....
The only bug that really impacts me so far relates to grouping and moving large numbers of clips. The other one that crops up is every now and then the Concrete Limiter gets stuck at a gain-reduced setting.
I also think bridging technology is problematic in general. I had several crashing problems before I went through all my plug-ins one day and made
sure that Sonar was seeing the 64-bit versions of plug-ins instead of the 32-bit ones if both were installed. That made a
huge difference in terms of stability. As in, HUGE.
There have been other bugs, but they're not repeatable and happen rarely, so they don't really impact me...I just close, re-open, and keep going. But the weirdest bug I EVER had was when all of a sudden, the audio became distorted, like the Master Out had been turned all the way up. It drove me crazy trying to figure out what the problem was, I spent about an hour checking levels, seeing if some saturation plug-in had become enabled accidentally, checking latency, you name it. Finally, I gave up and booted up Ableton Live...
and its audio was distorted too. Argh. I turned off the computer, turned it back on again, and the audio was fine and has been fine ever since. WTF?!?
Anyway, now it's time for me to say good-bye to the forum.
Bye everybody! Good-bye!! See ya! ..because I have a mix I'm working on, and I want to finish off the guitar processing before I go to bed

It's a cover of the Animals' "We Gotta Get Out of this Place," and it will end up on my YouTube channel one of these days. If Sonar crashes or freezes, I'll return and let you know.