ID 402878 - Area Lights cast a shadow when another light is used.

Problem summary
Area Lights cast a shadow when another light is used.

Customer reported version
modo.13.1v1

Customer reported platform
windows10

Steps to reproduce

1) Download and open the attached scene.

2) Press F8 to bring up the preview render.

3) Change the Perspective to Camera 2

4) Notice how the Area light seems to be casting a square shadow.

Expected behaviour
The Area Light shouldn't cast a shadow.

Actual behaviour
The Area Light is casting a shadow.

Workaround

Change the light Falloff Type to Inverse Distance instead of Inverse Distance Squared:

Reproduced by support

This bug has been reproduced in:

13.1v1 - Windows 10 - Centos 7 - MacOS 10.13
13.0v1 - Windows 10

12.2v2 - Windows 10

12.1v2 - Windows 10

12.0v1 - Windows 10

11.2v3 - Windows 10

11.1v1 - Windows 10

11.0v3 - Windows 10

10.2v4 - Windows 10 - Centos 7 - MacOS 10.13

Earliest version tested

10.2v4 - This issue appears to be in all versions of the product.