Thanks for the welcome and responses!
I checked under the leaves and no caterpillars, however i do see a couple of black aphid flies around the soil. Are aphids a problem for blueberries?
My patio is south facing, however I may try turning the plant to see if the leaves change on one side or another. Perhaps only one side is getting enough sun.
I also just re-potted last fall and used a mixture of peat, sheep manure, with wood chips on top.
As the pot is self watering, I only water when I feel the soil is no longer moist 1 inch down.