When does that happen ? Are you standing still and afk farming mobs or doing other stuff like world quests etc ? If you are afk farming even tho you’re pressing the buttons killing mobs etc your characters will go AFK status after I think 15 or 30 min, and then you can get issue you are describing. What worked for me in the past was simply just jump with all the toons every 5-10 min to avoid that.