It sometimes happens to me, that i use Jeannes Lvl 3 ability to call the companions but they dont spawn. Sadly you still get a cooldown if that happens. I think it happens if you move after clicking the ability, essentially canceling the animation and ability
After some more time, it happened a lot more times. I think it is in relation to the range, that you spawn the companions with. If the area where there should spawn is out of the map (for exemple on the corner of the map) then they wont spawn.
The same thing happens, when you stand in front of a building and try to spawn them “inside” the building.
the bug here is obviously the cooldown getting triggered without the champions spawning