TextBox allows text outside the box and shows cursor outside too

Hello,

I'm new to Mini2dx. 
I'm creating this UI with a TextBox, but when the player uses it, it can insert text much beyond it's size, even blinking the cursor outside the box.

![image](https://github.com/mini2Dx/mini2Dx/assets/6833155/7a524607-ba94-4d00-9ab9-aca5cfad8206)

How should I fix this?
Thanks,