the most common ways this happens are by:
- beating a high accuracy nomod play with HD and getting significantly worse accuracy
- beating a HR FC with HD and higher accuracy (if you can do both just use HDHR)
- getting a higher score (barely) but significantly worse accuracy + more misses at the end
the solution to all of these is just get a better play on the map to get your pp back. in the time you complain about losing pp, you could be playing the map again or playing a different map to get it back. c: