ATC telling me I'm at the incorrect altitude

[ChiefSniper08]

I wonder if this is in some way related to the fluctuating temperature/weather issues at present.

Wrong temperatures

Flying over north Africa (Algeria) at FL400, look temperatures: TAT=> +71° SAT=> +30° [Microsoft Flight Simulator 22_07_2021 14_57_55] [Microsoft Flight Simulator 22_07_2021 14_57_40]