Honestly, I don't understand it either, that's why I tried different TCR's, tried different wattage, raising the temp, etc. Finally out of frustration I slightly spaced the coils and bingo. I wouldn't have mentioned it at all since I don't have that particular atty, but when I read your 1st post it sounded exactly like what I went through. Good luck, I hope you get it sorted.
PS iirc when I tried contact SS the temperature on Escribe seemed to jump immediately to set temp (no way could it have been so fast), then it was all over the place. However with the same contact coils it worked fine in normal power mode. All I could think of was for whatever reason, my contact coils were messing with the chip in TC. I can't give you a good reason as to why.
Cheers,
Steve