BuddyPress.org

Currently the BP upgrade instructions mention this as step 3:

“Upgrading with the Plugin Updater

1. BACK UP your existing install including the database.

2. It’s very important to first de-activate any plugins that require BuddyPress to run before updating BuddyPress.

3. De-activate the BuddyPress plugin.”

https://codex.buddypress.org/getting-started/upgrading-from-10x/

This might need to be changed then? I actually would not know to what as I never managed to have a straight update without white-screens and other problems as described above, but maybe that was because of following the instructions?