Hey folks, sorry about the bounce tempo change issue.
It was caused by a subtle change that happened earlier on in the cycle. The reason it wasn't noticed during testing is because the problem tends to be intermittent and it depends on what you played in the project or where you clicked on the timeline earlier. While debugging it it took forever for me to find a recipe that was deterministic.
Anyway the problem has been fixed. We will release it officially once it has been validated but that is likely to be early next week. In the interim you have two possibilities. You can roll back or use realtime bounce and it should work fine.
There is also a 3rd possibility <g> if you are brave and want to test this build here is a link where you can get the updated SONAR exe
from here. Note that this is a "loose exe" so you will need to copy the proper flavor (x64/86 or Platinum/Pro/Artist) to your SONAR programs folder. If you test it let me know if it works.