Lacetti: despite ignition, all control lights in the instrument cluster are illuminated

Hello friends! First of all, here’s a Healthy New Year!!!!!!!! And now my problem: my friend’s Lacetti has been having problems electronically for a few weeks now. When she turns off the ignition and pulls the key, all the control lights in the instrument cluster start to light up again. Also the tank indicator suddenly shows up again. Partially the problem also occurred when the car was locked by ZV. The car otherwise runs impeccable. My suspicion was the ignition lock. (????) MFG Cleandevil