These seem to be randomly generated, every time I reload the flight they change position and pattern.
I have noticed them only flying over the alps, so it might be an issue related to the terrain altitude?
Hi @gpaolo79, thank you for the report. There is a large topic discussing this issue linked below. If you don’t mind, please take a look there and see if it has been reported for your location shown above. (looks like LOWI, which I believe has been reported).
Also, make sure to click the vote button there. Since that topic has 160 votes, I am going to mark this one as closed so it doesn’t split the votes. Thanks for understanding.