uiLoader with mask and animation doesn't work

I don't know how to explain, but when i do animate a uiLoader with classic tween it and masks, doesn't show anything.

Source files attached:
(396.42 KiB) Downloaded 20 times
If I remove the Alpha animation from uiLoader, it will load the image, but the animation will bug and dissapear, looks like the mask isn't animating properly.

To use the template, just insert the following template data:

Key: logo
Value: https://i.imgur.com/emYkO9a.png

Thanks for the attention!