Product not found - have to restart phone every time

Since the new update.. "Product not found", restart my phone... Bingo... Start playing Sonos. Phone goes to sleep. Wife uses her phone to change the song. Later I Open Sonos app to change the song "product not found". Restart my phone. Sonos able to find products. Phone goes to sleep... You guessed it "product not found"

Having spent a fair bit of money, I didn't think having to restart my phone is an acceptable way to change a song....