I feel you on this as it happens to me as well. I think that our brain gets too many impulses from the outside world (digital one mostly) and it opens a lot of pathways that are left for exploring. And at different point one or the other fires up. But while this could be seen as creative, myself I've gotten to the conclusion that it is getting me more trying and defocus from the real, big and important things that I can achieve. And sometimes I am imposing to myself to refocus.