Both of your imported audio are misaligned with where BIAB starts.

The audio tracks start at bar 5. BIAB has a two bar lead-in and instruments begin at bar 1. The audio tracks have 4 bars of silence before beginning which may be correct if there's intended to be 4 bars of BIAB instruments playing before the imported audio properly starts on bar 5.

That's fine if it's how it should be. Even if that's correct, by all appearances, Utility#2 is aligned with bar 5 and the original imported audio isn't. This suggests that syncing the original audio file may have been overlooked since visually the offset of the two tracks is roughly two bars. I note that the second imported audio file is aligned with bar 5 whereas the original imported file was not aligned with bar 5 and by visually estimating the sync disparity, It looks like the original imported audio was off by approximately the required two bar lead in BIAB applies to the project.

This could occur when the first audio file was originally imported, it was not synchronized as bar 1 of the audio file. BIAB starts at bar 1 regardless where the imported audio is to begin. It's common for vocals to begin after an instrumental intro. Perhaps the audio file is a vocal stem derived from a third party Stem Splitter program. It still must be properly aligned with BIAB to start at the proper BIAB bar, 1,5,9 or any bar.

There certainly may be tempo issues but there is a waveform issue of one audio track begins before the other at import. Any tempo issues will be obvious when the two audio files are both starting at whichever is the proper bar. Bar 1, which is correct for BIAB, or bar 5 if that's the right place for the audio track on this particular project.

This can be tested by opening Utility#1 in the Audio Edit Window and selecting the very beginning of the audio waveform, right clicking and marking the curser at bar 5 so the waveform beginning will align at bar 5 the same as Utlity#2 track and they should align in the Tracks View.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.