I just run into this bug today.
PC
Hardcore Breakthrough (the Friday Night Portal mode) Operation Firestorm
SV-98, 6x Optics, Rangefinder, Red Laser, Brake, Grip
It happened multiple times like this.
Peak from cover -> ADS -> Thermal Optics all of a sudden (the magnification didn't change)
It happened around in the Industrial zone, I was on the attacking team and facing the sun, so my theory was it had something to do with a sudden change of contrast (the dark Hangars vs the bright sunglare or white smoke). However I wasn't able to reproduce it.
