The three festivals are relatively close together in the grand scheme of things. The most logical route would be Pukkelpop - CV - Lowlands then the UK but the mileage isn't massive either way. I still think we'll get them on the Sunday.
Is it? QOTSA would have to play Pukkelpop, Cabaret and Lowlands (or the other way around) in three days with a strange routing. I‘d say they either dropped out of Pukkelpop or Lowlands.
This year they were announced for the Thursday at Cabaret which allowed them to do all three fests.