Kbin not saving the account, asks me to relog in after little time

Hi, I've kind of stopped using kbin, the reason being that every time I go on this website, it asks me to relog in, even though I've selected remember me last time that I did log in.

I use a home made password manager so the password is complex and I don't remember it straight away, making it quite annoying. Is this a common problem? I have it both on the phone and on my PC, in one I use the duck duck go browser, in the other I use brave