Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 8.1.1
• Cross-platform modules: 8.1.3
• Android Runtime: 8.1.0
• iOS Runtime: 8.1.0
• XCode Version:
• Plugin(s):

Describe the bug
In new version, when I set the color or background-color with css or by attributewith the value "transparent", I will get this error:
Error: Failed to apply property [background] with value [transparent] to GridLayout(69). Error: Expected 1 or 4 constructor parameters.
For css, if I change from transparent to rgba(0,0,0,0), it will working. But for the inline attribute, like this:
<StackLayout
background="rgba(0,0,0,0)"

I will still get the above error:
Failed to apply property [background] with value [rgba(0, 0, 0, 0)] to GridLayout(69). Error: Expected 1 or 4 constructor parameters.
To Reproduce
<StackLayout
background="rgba(0,0,0,0)"

For css:
background: transparent;

Expected behavior
It should be working like before.
Sample project

Additional context