This happend to me on a pair that came to me second hand on a bike, got about 15 flats in a month, noticed after a fast corner flats would occur, tried sticky high pressure rim tape with no luck, eventually I sorted it by running insulation tape over the rim tape which made the tyres a pain to get on but it worked, no idea why but it did, good luck I feel your pain punctures are shit
This happend to me on a pair that came to me second hand on a bike, got about 15 flats in a month, noticed after a fast corner flats would occur, tried sticky high pressure rim tape with no luck, eventually I sorted it by running insulation tape over the rim tape which made the tyres a pain to get on but it worked, no idea why but it did, good luck I feel your pain punctures are shit