Yes, I have noticed this also. To be honest, I don't even think of it as a way to earn sats anymore. That seems to have ended for me a while ago. It seems buggier too. I do still like to support the app, and I am hoping it's just a temporary situation. They don't have a huge staff, so these issues may get resolved in time. Maybe they should just end the earning feature and let people fund their own wallets for tipping. It's got to be tough giving away sats in a bull market.