mp3 is bloated to 192kbps from 128kbps, what violates the RC rules "...not be encoded upwards from a lower bitrate."
please use this as a better one:
https://cdn.discordapp.com/attachments/969224188197994526/980154930881003561/audio.mp3 (offset is same)
for those who are interested:
old mp3 spec - https://i.imgur.com/EFEeNzG.png
new mp3 spec - https://i.imgur.com/Yn1jfEN.png