Free Minion with weapon swap?

So I'm messing around with having a scepter as my 2nd weapon set.
Turns out I am not dismissing or summoning minions properly. Something is definitely wrong here.
- Lv 5, 0 spirit without scepter equipped.
- Buffs showing 10! TEN! Skeleton snipers alive.
- When swapped to 2H mace, keeps one skeleton sniper unit active (sometimes)

https://imgur.com/a/eO8eGEV

After playing around a bit more, it seem I keep one minion after using the command skill at least once. I am able to continue using the command skill of that minion while it lives.
After swapping to scepter then back to non-scepter weapon set, certain actions (e.g. interaction with a loot container) will spawn one skeleton sniper if it was ready to be revived.
Just swapping weapon sets properly dismisses all minions, but doing this seems to refresh the bug for reviving at least 1 skeleton sniper while having 0 max spirit available.