After a bit of playing about, it seems related to current battery level and whether it's currently on.
Like plugging in at 2 bars won't charge it at all now, either on or off, and not even directly in the PS5, where at 0 bars, we managed to get it charging in the Anker charger by powering the controller off, plugging it in, and then you could power on again and have it carry on.
I don't know if this is intended or a bug.
Thousands of people from all over the world. Primarily PC gamers. Paying thousands in flights and accommodation. All to see a predatory phone game get revealed.
Should have saved that shit for the quarterly shareholder report.