The switch to vision-only seems to be the cause - I've seen reports of people with radars installed that are on the autopilot beta program which got them the vi

The switch to vision-only seems to be the cause - I've seen reports of people with radars installed that are on the autopilot beta program which got them the vision-only autopilot deployment, and they reported that they suddenly started getting a bunch of phantom braking. Reverting back to the version with radar for those with it installed reportedly fixed it. So people who've bought recent no-radar Teslas are having a different experience than those with older models.