Hello,
The new feature "Message to self" is really amazing, I have been using this feature and found it interesting, there is an issue with "Pin the message" which has been sent to self. I have tried pinning a message, sent to self, it got pinned successfully and when I opened the chat after an hour, after moving to other chats and screens it got unpinned automatically.
Steps to Reproduce the issue:
1. Go to chat to self
2. Pin any message that has been sent to self
3. Move to other chats or screens
4. Check the chat to self after an hour
5. Message will be unpinned automatically
