SpriteMasking visibility problem

[RocketBoyGames]

SpriteMasking. The mask sprite is visible when used in external layouts.

Please double check that the bug is not already reported in the issues list. I'm reporting as suggested by a moderator.

Steps to reproduce the behavior:

1. Create external layout, add objects.
2. Mask the object with a mask sprite
3. Launch the game
4. The mask is functioning correctly (only the masked area is visible) but the mask itself is visible as well.

Here is a small example https://drive.google.com/file/d/1qALigq8vnI3Z_y7XB1jQLC3HR_oS7HI0/view?usp=sharing