So, I was just trying these out after the latest changes (on a Stam DK). According to the tooltip, Sload's call should only drop off when crouching, invisible or when removing the gloves.
But I'm finding it drops off after transitioning between areas. So using a wayshrine, entering a delve/trial, entering my house, etc are all making the buff/debuff drop off. Surely that's not how they supposed to work? Has anyone else found this problem?