Rect Mask 2D won't update if I move

Hello!

I'm having some trouble with Rect Mask 2D... I have this structure:

Mask (Rect Mask 2D (also tried with Image+Mask))

EmptyOrganizer (Clean game object)

Enemies holder (Clean game object)

The tanks (Image, Box Collider, Animator)

This is what's inside the mask:

Then I need to have the same structure but 2 times smaller and on the left side. So I scaled everything and moved the mask with everything inside to the left. Than this happen:

The tanks and the mouse image disappear. It will only show when it's in the 1/3 screen to the left, not where it should appear. The same happen if I move to the right, top or bottom. I can move like 100 pixels to each side and it's everything ok. If I cross this "line" the side that's in the middle disappear.

Here's a video showing it: https://youtu.be/1RtZwY2v3wk

Anyone know what it could be?

Thanks guys! ♥