2 Audio files are mp3s but disguised as wav files, which gives an error in audacity trying to load it in as a .wav but doesn't give a problem when you change it to .mp3, also both have a 5ms delay issue
Unsnapped object (or the slider which ends on the wrong tick) and bad hitsounding actually (in some moments mapper just didn't show music sounds, which he had to show)
https://osu.ppy.sh/beatmapsets/1016769#osu/2128030