Mask with text

In the EGP when making a text with and still (mask with text) it does not behave.

When dragging the text to the left, it stays visible on the still all the way

When I drag the text to the right, and the left side of the text reaches somewhere in the middle of the screen, it suddenly jumps all the way to the right and disappears entirely.

I think this behavior has been around for some builds, but never paid any attention to it.

Build 4