What part there? Did you press ctrl to hide text? That stops everything else from happening. Pressing ctrl again will bring back the text and you can continue.
Hmmm. This is the first time that I've heard of this happening. Might be something on your computer that can't handle the game. I'm not savvy with that kind of stuff, I guess my best bet is to google the problem and see if other people have had similar problems. The engine is "RPG maker MV" so searching something like "rpg maker mv computer freezing" might give answers.