Well since your current trip and since last charge are not in sync I am guessing you lost some to standby losses (preconditioning, battery warming, sentry mode?)
The only way you will see the full pack usage is going 100% to 0% in one trip. The parked losses don't show up in your trip usage. I guess that makes sense but I've always found it a bit odd and confusing.
On a range test in a 2022 M3P, which has the 82 kWh battery, the driver went 100% to 0% and his trip meter showed 75 kWh used. He then drove it past 0% for a while and was able to get to 79 kWh used before the car was pretty much completely dead. There's a small reserve and you will never get 100% of the battery either because of energy losses.
100% to 0% at your Wh/km of 215 you would probably get about 230 km or so in one trip if you stopped right at 0%
OK, sure. Yes, that would do it I guess. Yes, those three things you have listed took place, but still, shocking that they would amount to 20% in just 36 hrs and it was not -25C outside like in Alberta.
Dude.. just enjoy the car. stop being so anal.
This comment is so deep i could not resist replying. Thanks for your insights.