So I have an update. On Firefox and Arc clearing website data and cookies fixed it. On Chrome going to lemm.ee show me as not logged in, but hitting refresh after the page is loaded shows me logged in. Idk what's causing it 🤷‍♂️

So I tried this and it helped on Firefox and Arc, which now I can stay logged in (FF had the issue of just loading an error with the site, maybe old cookies or something?). However, on Chrome I still have the same issue even after clearing cookies and site data. I'll try looking if there's any extensions messing with it. Thank you for your help!