Transparent canvas bug with MS Edge browser

I have a display bug with the Microsoft Edge browser when the transparent canvas option is enabled. Here is my link. Everything works fine with Chrome and Safari.

My test link here

Any news ?
Direct link here:

Both look the same on Edge and Chrome?

Well this is what I got from 3 PC running Edge ! ?? Is there a setting I do not know?

So weird! I try on 3 different machines and I got the visual bug bellow.

I think this is the version of Edge I’m running: Edge/17.17134

Using the out of the box settings and your projects

Mine is: Microsoft EdgeHTML 15.15063.

Could be a bug in an older version or requires an Edge specific CSS style