Sounds about right, and I've experienced that back-and-forth switching a decent amount. When I start getting stuck in loops like that unable to decide what to work on, I feel like it's my brain telling me to step away for a while. So I usually try to do something away from a screen. Even better if it's constructive, as it'll usually help you either solve a problem you're stuck on or help a decision or two that you might have been torn between.

Personally my burnout-preventing hobbies include biking, walking my dog, reading a book, woodworking, geocaching, and photography.