Translucent Materials will receive incorrect shadows in forward shading. This is working as expected in 4.18 CL# 3832480
Found in 4.19 CL# 4033788, 4.20 CL# 4369336, 4.21 CL# 4408769, 4.22 CL# 4413632
This is a regression.
Results:
The shadow that is cast will be incorrect
Expected:
The shadow would be correct
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-64663 in the post.