Safari keeps signing me out of my accounts

For the past 6 months, Safari has been signing me out of my accounts (Youtube, Amazon, Facebook, Google, ex...) extremely frequently, and it is incredibly annoying. It happens multiple times every day. This didn't use to be the case. I used to be able to stay signed into Google indefinitely.

In order to make sure that Safari is causing this, I signed into an account on Chrome. I've stayed logged into my account of Chrome for over 2 months. I get logged out on Safari every single day.

Does anyone know what is causing this?