This is a very good question! I have problems with sencha too! However, the same issues rarely happen with green tea since I switched to Longjing and drink it in the afternoon, following Leo’s recommendation in this link: https://www.teaguardian.com/what-is-tea/green-tea-taste-health-tips.html#.UpQJ1pHVof8
I don’t know about the puer you mentioned, but I use Menghai Spring exclusively now, and mostly after lunch and dinner. Make it in a Yixing pot and the taste fab!
