The PIREP for my recent flight EGCC-LSGS shows a fuel burn of over 42000kg which is way too high. I loaded approx 9 tonnes using Compare mode. PIREP is here. For some reason I wasn't charged for the fuel.
And my sig banner still says I'm at LPPT despite having done two flights since then.
Glad to report some progress... my sig banner now shows my correct location. It became correct sometime this morning. The aircraft I few on the 'crazy fuel' flight is at LSGS showing just over 3 tonnes of fuel on board. Later I will fly it back to EGCC and see what the fuel figures are.
I'm currently working on improving the bug-info file which will show more detailed information on the flight. I hope this will help me to understand your bug.