foe buybox eligibility

I have seen many sellers experiencing losing buybox eligibility without anything on their account changing or even any thing negative showing up. I’m not seeing many posts on reddit about it. I am also going through this. Losing it then getting it back then losing it and getting it back and now have lost it again. Haven’t had so much as a negative feedback or a to z claim in the last 4 months. Is anyone else on here going through this? I’m going crazy!