@conny: I have the same problem, which is very odd as it has not always been like that.
@Henric: If I understand you right, all six warning lights on the lower left are lit with the engine off, including TANKPUMP?
I will check this out, there has to be a bug somewhere that I overlooked. It happens. ;)
Win 10 Pro | P3D v4.5 | AMD Ryzen 3 3.5 GHz | 32 GB RAM | NVIDIA GT1030 | TM HOTAS Warthog | TM HOTAS Cougar