I read you description of the problem and all I can say is, I have done very similar manipulation of midi files into BIAB in the past and I have never seen this issue with Tempo. I thought if we had the same file we could try to confirm the issue. Maybe it is the current version?? Short of that, this problem just has not been reported before.


BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, 1TB WD Black NVMe SSD, 2TB WDC Blue SSD, 1TB WD Blue, 2 TB SK NVMe, 6 TB External, Motu Audio Express 6x6