How does BP regen work exactly? I initially thought that it resets every 20 minutes starting from when you first use it (from 5 points), and resets on a 20 minute interval thereafter regardless of how you use it (with the exception of using an item that gives you BP; i.e. leaf or seed). But from some testing in this event it seems to be 20 minutes since any BP was last changed. That is, if you do a standard raid and takes 19.9 minutes (extreme case), then start another one before that 20 minute interval is up since when your BP last changed, then doing 5 of those would take you almost 100 minutes, but you wouldn't regen a single point of BP during the process.

At a quick glance I can't seem to find any info on this on the Japanese wiki. So I'm curious if anyone knew the answer.