Reproduction:
-Go to Video Settings.
-Toggle "Fancy Leaves" on.
This may be the case where the device used (Galaxy Note 5) may not be powerful enough, BUT since the option is there anyway, the leaves should become transparent. However when enabling "Fancy Leaves", they stay opaque.
Cleaning up old tickets: This ticket has not been updated recently (~1 year+) so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
Quick Links:
📓 Issue Guidelines – 💬 Mojang Support – 📧 Suggestions – 📖 Minecraft Wiki