Score sets wrong category when trying to publish

Hi, I have transcribed a drum part from Amaranthe's Endlessly but when I try to publish it always saves under part name "Piano" and categories "Rock for Piano" and "Metal For Piano". Despite me even putting it in "Percussion Ensamble". In Musescore it says that the only instruments being used are the drumset.

When I published another transcription of Mitski's My Love Mine All Mine Musescore correctly identified it as being in "Drum group" instead of "Piano" even though I didn't do anything differently.

Has anyone encountered this before? And how do I make it go into the right instruments category?