You can see this for yourself if you watch yourself in the mirror.
Your chest and shoulders will rise when you inhale and this is what you do when you sing.
It gets more difficult when you don’t control the release of this air.
You simply let it rush out much faster than you should.
And, if you do try to control it, you try to control it in the wrong way.
If you’ve ever had a sore or tight throat/chest while you sing then you know what I mean.
So I’ve just outlined your problem, but how do you fix it?
The good news for you is that the problem is 100% fixable.