What I have found is sometimes songs you made with an earlier version will play fine if you use the BIAB 2019 32-bit but will distort when you use the 64-bit edition. I did an experiment where I loaded my song into BIAB 64-bit and copied all the chords for the song. Now close down the song and make a new one. Next paste all the chords you copied from the previous. Now if you play the distortion should be gone. I saved this new version made by the BIAB 64-bit with a new title. So I now have two versions of the song one made earlier and one re-made which is basically the identical song but re-made in the latest 64-bit edition. If I load and play my original song I get distortion but if I load and play the new version there is no distortion.

Like you there was never distortion using the 32-bit BIAB 2019.

Could you try doing what I suggest and see if it makes any difference?