I am 0 for 2 in using these filters. New Mini 2 (Nov 2020) new skyreat 6 pack ND (Nov 2020). Note: I'm a commercial photographer and own over a grand of filters and these things do not stay on. I'm either doing something incredibly wrong or there is a new production lot that FALLS OFF during flight? Again, not my first rodeo. I can't get any of the 6 to adhere firmly to the lens. Please advise.