Short description of error
Hair Info Normal Tangents are still not working as they were in builds from April and before.
I filed a bug report (T65042) in May and it was marked as solved, using the latest build though shows the hair shading is even wonkier than before:
9c5d54bfaf48 (Latest build, broken):
I would really appreciate a thorough look into this, it appears the problem has persisted for almost 2 months now.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).