I’ve got a new theory that UM has been mixing up their typical arrangement of It Doesn’t Matter and adding a new jam section for the purposes of using the song (with 3 jam sections) as a future jam set vehicle, perhaps at UM Bowl this year.
Throughout 2020 the song consistently had 2 jam sections
They started mixing it up in the last 3 versions (here’s a preview of 2021):
The first two of the year are normal 2-section takes, but notice on 6/25 there are 3 fairly distinct jam sections. Then again on 8/6 they attempt to go for 3 again, but a missed cue by Stasik at ~3:30 meant they didn’t really take the first section very type 2, but still fill in with another 2 whole sections. Then on 8/21 they commit and give us 3 solidly distinct jam sections that were well choreographed among the band.