Do mounts lose potential for any reason?

I recently came back to wynncraft excited for Fruma and the mount system(big horse gambler here, my friends kept telling me to stop) and I had a white horse that I used extensively as a shaman. When I first logged on my white horse had 1200 potential, I *think* I'm pretty sure. I definitely remember seeing the max potential being 120 in all the stats and I logged in the next day and it was at 882.

I don't know if this is a bug because I can't find any info anywhere about mount potential going down for any reason or if having a 1200 potential horse was unintended or if I'm just misremembering the whole thing. If anyone could enlighten me that would be amazing because I cannot stop thinking about it. Maybe it was told to me in the stable tutorial and I just missed it which would be pretty sad on my part lol.