The real problem is how often it feels that BG3 is not particularly good at UNDERSTANDING its own rules (or the rules of the system it is based on), let alone explain it to the others.
For example, there's a reason if D&D explicitly tells you that in no case you are supposed to be able to cast two spells in the same turn. And that reason was clearly lost to whoever at Larian applied it to the game.
That is one of my favorite changes they made! I love casting 2 spells in the same turn!