Most of these are not bugs - It's wrong settings or incompartibility of your system (shader issues, Seus PTGI is still in development, contains bugs)
Leave planes are non-transparent
Set Graphics to Fancy, Or set Trees to Fancy in Detail Settings.
Armor not reflective/Shiny
Wrong Optifine Verision - Use Optifine E8 pre1 or newer(On the top of the Optifine Download page, there is a button "Preview Version"
blocks look flat/have strange reflections (the image is a bad example, but most blocks really look bad.
Shader Settings --> RayTracing Settings --> Full RayTrace Reflections: ONAlso, check if Normal and Specular Maps are ON in the Shader Selection List.