New K1C but problems with Sunlu High speed PLA?

Had K1C for two weeks and printed a fair bit of stuff without any real problems until I bought some Sunlu high-speed PLA and on printing the same file as I was printing with the Creality hyper PLA with no problems I had four failures most were due to poor bed adhesion but the one i got a fair way with failed at printing internal threads, quite large pitch and it looked to me like it was a case of poor adhesion