Swirls on dial / sapphire crystal in bright sun light

[Dinami7]

Hello guys I hope you are all well . I’m a little bit late to the party but I’ve started being obsessed after I’ve noticed a weird kind of scratch that I’m pretty sure is on the dial . I own the watch couple of months and last month I’ve decided to take for service to a reputable high end watch maker in my country. The past few days I’ve noticed under sunlight and at specific angles a kind of abstract mark on my dial . I became ocd and start looking with magnification cameras etc . It looks is dial and not crystal . I decided to take it back to the service center . They inspected it and they called me to see on my own under microscope the dial . And in microscope the dial was perfect no flows . So I took it back thinking I’m getting crazy as I’m the only I can see it . Still there under LED light or sunlight and at an angle is there big and strong in my eyes . Any ideas please cause I’m loosing it lol. Mark is this little F under explorer letters