If Sonar was more buggy than ever then I believe others would have similar issues, and you would have seen them on the forum frequently.
Your sparse description of the issues doesn't give much to start guessing.
Locked clips? Tracks not expanded? Gain staging problems?
Is it a live bass (recorded audio) or a soft synth? If a real one, how does the waveform look? Has it clipped
already while recording? If something hasn't clipped at input, it shouldn't audibly clip in a 32 bit floating point
environment.