If the clutch has started slipping since the remap presumably its to do with the remap. My understanding is that the characteristics of (some) remaps means the power is fed in a little less aggressively so the clutch doesn't slip. Maybe the map can be adjusted depending on the type of remap you have?
TBH that's why I left the power output standard as I didn't want any issues with the clutch and instead made it quicker through the corners with Koni
coilovers. No problems with the clutch.....car has covered just under 50k miles.
I'd be amazed if the dealer will replace the clutch under warranty after 32k miles, whether of not they detect the remap. Good luck!