SetEmissiveColorAll does not work

Apologies for not reporting this fault sooner but it appears that the new SetEmissiveColorAll command doesn't work when I've applied it to an object. Currently using latest nightly build

I was unaware that another nightly build had been posted since I posted the problem. It seems to be mostly fixed for me but I have an object which has a meshbuilder section that refuses to be affected by the SetEmissiveColorAll command. 

For some reason I can't post screenshots, so I have attached the object in question. https://drive.google.com/file/d/10l5n1ByQGkKdEW0K7ZdDGFwurGbOscwh/view?usp=sharing 

The affected mesh starts at line number 3941