I usually get distracted reading one of the different APIs in the documentation and went down on a rabbit hole reading the whole history of some totally unrelated thing that just popped into my head and then realized what I had to do when I was going to bed and I ended up working thru the night.

The other times I got stuck for a couple of hours looking for new themes for my code editor because I didn't like how my current theme looked.

Oh well ¯\_(ツ)_/¯