Disappearing spells on cast without effect (Divinity: Original Sin 2)

There was an extremely unpleasant problem in the form of the disappearance of spells and attacks on opponents, well, just their disappearance "eating" and so on. Energy is spent on them, and the spell itself simply disappears. At first I thought that this was a mechanic like "past" when attacking only on spells, but when using the explosion skills on a swollen corpse, nothing happened, and on the skill itself it was written that it had already been used, it was clear that there were some problems with the game. In terms of performance, everything is not so bad, it is more playable, but because of this problem, there is no desire to build any tactics and think when at any moment the game can turn the fuck on me just by eating spells. If anyone knows what this problem is and how to solve it, I will be grateful, since I did not find anything on the Internet about this