Kalitas + destroy spell + mirrorpool = ???

Okay, so in my recent scenario I have Kalitas on the board, I cast mirrorpool from hand and then a kill spell (either grip of desolation or to the slaughter, can’t remember - shouldn’t matter) against opponent’s creature.

The outcome? Mirrorpool reinforced the 2/2 zombie token that Kalitas generated via the destroyed opponent’s creature. Shouldn’t mirrorpool charge up the next spell in my hand as soon as the destroy spell I cast is resolved?

DEVS FIX MIRRORPOOL PLS

I’ve noticed mirrorpool not working correctly as well. Sometimes the support dissapears and your spell won’t charge. Seeing this pretty regularly.

Keep in mind: if you use mirrorpool to charge a spell instead of reinforce a creature, if the first spell in your hand is full before a mirrorpool+ spell combo, the mirrorpool will still fill up your already full spell!