* It should be dismissed. If it can be resummoned, you can restore its health immediately by doing so without invoking the cooldown. Wil lfix.*note - In my opinion for this Lion stuff, I actually prefer the Lion to be resummoned when casting Call War Lion while the Lion is already active. My suggestion is to enable the Buff icon for the Lion on the character and then be able to right click that in order to dismiss the Lion.
** known issue /petname does not work
** It does work. If your lion is active when you use it, you'll need to resummon it.