Model S 90D, about 40K KM. Running fine. The day before yesterday, I ran the SOC down to 4% and then charged it back to 90% using mobile charger. I did not drive it yesterday so the car sat in the garage. Local temperature is at 21C. However this morning, when I drove my son to school I noticed my regeneration was limited to somewhere between 40-50KW and just now i saw the regeneration braking was still limited. This has never happened to me. I made a call to Tesla support, the agent looked through the logs and saw nothing wrong. He later on told me when state of charge was higher than 90%, regeneration braking would be limited. Unless the SOC goes "way lower" than 90% (somewhere 85%) will it come back to normal. Does this sound right? I know when SOC is very high (>95%), it will be limited regardless of temperature and I personally observed the BMS behaved like 95% was the threshold, but I don't know 90% is actually the threshold and it never happened to me. Anyone can shed light on this?