My car just started experiencing SOC issues as well. My max charge rate is now 270. My car has 16k miles 2019 M3AWD. My battery also doesnt charge as quickly as it used to. I used to get a steady 30 miles an hour with my Nema 14-50. I now get about 26/27. I contacted Tesla and they gave me some BS that my car is within fleet and its driving habits. I dont drive fast at all... And according to TeslaFi/StatsApp and I am nowhere within fleet. So Tesla is flat out lying to people. We will see what happens but I have been having a lot of problems with my model 3 lately. I am a hardcore Tesla fan boy but I am really started to get ticked off. I dont know how to handle the situation. All I know is that I am pissed. I was told degradation would be 2-3% a year. I now know that that is BS....