I started monitoring my Model 3 48A HPWC charging using Sense Direct Circuit Monitoring a little over a month ago. Ironically, that seems to be about the time that Model 3 Model started working the best I have yet seen !
Of the 971 hours since I installed DCM, Sense got 965 of them correct. Of the 31 charging hours, Sense detection only missed 1 charging session of 5 hours that overlapped with a Model S charging session, plus one short 20 min session.