Cherry blossom leaves do not have any change when within a cold climate biome while it snows unlike the other leaves. As of looking up for any live bug report already, I found one for azalea leaves but that is apparently intentional, but not sure if this is also intentional or hasn't been done yet as it's still a feature in development.
Related issues
Attachments
Comments

Thank you for your report!
We're tracking this issue in MCPE-168031, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki