Animating PopUp with TMP Text bug

I'm animating with Animator a simple gameObject that works as a PopUp, inside has a title and description and buttons and seems not be updating the font texture. [Gif attached]

This is the simple code I use to open it.

Code (CSharp):

1.        public void Open()
2.         {
3.             gameObject.SetActive(true);
4.             _animator.Play(animationInName);
5.         }

I've also tried using a Canvas, enabling it and disabling it instead of setting active or not the gameObject and it keeps the same behaviour