Ah weird. Did a bit of searching and it looks like maybe it targeted multiple frameworks with the xna API. Including xna itself
https://www.pcgamingwiki.com/wiki/Celeste https://celeste.ink/wiki/Version_history
https://www.pcgamingwiki.com/wiki/Celeste https://celeste.ink/wiki/Version_history
Monogame on PC used to be somewhat buggy in my hobbyist experience.