Deferred Decals Fade In With No Fade Duration Set

Decals fading in with Fade Duration set to zero.

Found in 4.21 CL# 4753647, 4.22 CL# 7053642, 4.23 Preview 5 CL# 7838574

1. Open the Editor
2. Create a Deferred Decal material
3. Place it in the scene
4. PIE

Results:
The decal will fade in even with no fade set

Expected:
The decal would not fade in

Workaround:
Set the Fade Duration to 0.01 and the decal will no longer fade in