UMG material not reflecting parameter collection change

Making changes to a scalar parameter in a material parameter collection at runtime will be ignored when using the material as a brush in UMG.

Here is a simple project to illustrate the bug (UE 4.14.3):

Hi HCK,

You will be happy to know that this issue is fixed in 4.15 already. I tested your project in the 4.15 preview and it works as expected.

You can find the public JIRA here:

Cheers,

Ed