Matt, identified this issue above:

Originally Posted By: Matt Finley
... muting the drums before the end is standard practice for me after enduring the clunk problem for so long. All of my songs have this and I would never have heard this problem.


What you are reporting is "the clunk problem". This has been a long running bug which continues to raise it head at times.


BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).