I have no idea what's it called( I think it's the enchantment animation) but when my item is enchanted, it won't show it. It'll just appear as if it's an unenchanted item! I love this shader so please, PLEASE fix this.

Thanks for the report! The problem will already be corrected in the next update.

This issue has been fixed! Check the last update! (5.20)

Sometimes the glow doesn't appear until after entering inventory. Probably due to a bug in Optifine.