I assume there's some cache of sessions or something somewhere.
For some sites, when I click to switch to cPanel from WHM, I get prompted that my cpsession isn't valid - but I just turned that off. For some sites it works, others it doesn't.
I can confirm I successfully turned it off because it no longer appears in the URL and I'm able to load my favorite WHM URLs now from bookmarks - which is why I turned it off in the first place.
So it must be storing these sessions somewhere that I need to remove.
For some sites, when I click to switch to cPanel from WHM, I get prompted that my cpsession isn't valid - but I just turned that off. For some sites it works, others it doesn't.
I can confirm I successfully turned it off because it no longer appears in the URL and I'm able to load my favorite WHM URLs now from bookmarks - which is why I turned it off in the first place.
So it must be storing these sessions somewhere that I need to remove.