Coolant boiling and spilling around while burping

What is your question?

I changed the thermostat to solve P0128 on my town and country. After that I attempted coolant top off with a funnel and it acts fine until certain point. Then I'm assuming after thermostat opens up it vigorously starts boiling and spilling everything around. Every video I watched online it does overflow when heat up. But it doesn't start throwing all the coolant around. What could be the issue?

What makes this problem better or worse?

It's worse when it stands for 15 minutes or so

How long has your 2012 Chrysler Town & Country had this problem?

Just diagnosed