Nothing is recording at 32-bits at this point in time, to the best of my knowledge. 24-bits is the max.
1. Are you loading 32-bit plugins into 64-bit Sonar?
2. Are any plugins meant for mixing/mastering, and not for tracking? Such plugins either use look-ahead processing or are otherwise very CPU intensive.
3. The problem sample rate for TTS-1 is 88 k, which is not an issue for your system.
4. Are you using a driver mode of ASIO?
5. Which specific plugins are you adding to projects that are having this issue?
Bob Bone