And WebView version can be out of sync with Edge (it's a bit of a pain to keep them in sync) - no idea if that causes this kind of issue (combined with MSVC mismatches).
I redid the drums in the end and tweaking a few other parts when I created the album/EP on Bandlab:
https://www.bandlab.com/xoospacemusic/albums/894cfe8e-74b3-ef11-88cf-000d3a930b95
Thanks for the constructive criticism all.
This sounds like you are using a workspace: you've edited one of the factory ones and use that, then the installer comes along and replaces the factory ones, resetting your changes. Use a user workspace and they won't get overwritten.