Optima NO6 CHT3 Natural Carbon, High Tension, G3 single string

As I said I love the way they sound. I bought many sets of these. So far in the short amount of time I have been trying them. I have had 6 strings pop on my while the guitar is at rest. Four As and 2 Ds have popped on two different guitars (Cordobas). The other thing I noticed is that they take longer to stretch and settle down. The A string takes days and days to fully stretch, thus it goes out of tune. I use a Roadie 2 to tune my guitars btw. I don’t know what the return policy is on this but will find out. These string are like 5 dollars or more a pop.