It doesn’t look like there were any recent changes to the logout behavior for EPS. There is a possibility this is linked to the login behavior for Epic accounts more broadly, but we need to do some additional checks.
Just to make sure we’re understanding everything correctly, can you let us know what the behavior was like before the changes? How long you stayed signed in? What you were doing prior to the logout (were you actively working or was the page left idle)? When you get logged out, is it immediately when you open the page or when you try to perform any action like posting a question or clicking a link?