64 bit process precision vocal recording question.

Not sure if this is a bug but when I switch from 32 bit to 64 bit my vocals being recorded sound dull. I recently noticed that my vocals while being monitored sound better than after I played them back. After switching back to 32 bit, my vocals sound identical while being monitored and being played back. In 32 bit, my vocal recording sounds way better than at 64 bit. Changing from 32 bit to 64 bit does not change the sound of vsts only audio being recorded. Just wanted to see if anyone else had this same experience.

Strange , are there any plugins on the track ?
And can you export the audio and post here for us to hear ?