With forward shading enabled in 4.21 shading appears to be too hard on certain faces. This is working as expected in 4.20 CL# 4369336
Found in 4.21 CL# 4613538 and 4.22 CL# 4666322
The shading in certain areas is incorrect
Shading on the same surfaces would appear the same as it does in deferred
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-67717 in the post.