Game Design Reset Spell Casting Time After Each Click

Currently, there's a set amount of time while you can cast a spell and it resets afterwards.

The problem is that that timer starts at your first click and doesn't reset after the second one, for example, let's say that you have 2 seconds to cast a spell and you press the second click after 1.8 seconds, now you only have 0.2 seconds to press the third click.
This makes spell casting annoying while playing with a bad internet connection, so it would be great if the timer would reset after the second click.

Showcase:

 

I don’t see why not

 

Seems good for people who don't have good internet connection. Why not

 

A reason why not could be that if you click the wrong key the second time, you’ll have to wait longer to cast the right spell (which I often do, I’m quite bad at using spells and still trying to play as a spell mage lol). I still think this suggestion is good though.