What happened? Was it me or my power meter

Today I road Dollar Law. To my surprise, I was riding with power in the three hundreds on the intervals. My FTP is set at 168 and should have been riding with a max power of 193 during the intervals. I just felt great and did not feel the lactate burn. I was unable to do this on my last VO2max interval. I am not sure if it was my power meter or me. Training peaks increased my FTP to 188. Guess I won’t know until I do another ramp test. I have Favero Assioma pedals and recently charged them. Seemed like when the charge was low I was getting low numbers.