Able to cast spell after enemy is dead

Platform, device and operation system
PC via bluestacks

What were you expecting to happen, and what actually happened

I was doing the first battle of the Chapter 15 side-quest for Jocea.
I killed the 3rd (final) enemy of the battle using elemental damage via matching gems.
I expected the battle to resolve normally with a victory animation and the rewards animations.

What actually happened was that the battle appeared to hang.
I waited about 30 seconds, expecting it would eventually resolve. However I noticed my spells were all showing ready to cast (lit up).
I tapped one of the spells to see if it would do anything.
The battle immediately began to resolve as normal, but was interrupted by a sever error (restart now), before I could retrieve the rewards.
Upon restart, it put me back at the victory condition and all rewards were received.

How often does this happen? When did it begin happening?

This the only time I have experienced this.

Steps to make it happen again

I honestly could not say.

This is likely some sort of connection hiccup. I’m reporting it anyway as this is the first time I’ve experienced a freeze like this where I could cast a spell.