Same here. When I've been developing an app for the majority of the day for several days straight (it's not my actual position so it stands out) I tend to have trouble sleeping due to being locked into it. When I do sleep it's usually a vague dream loop of trying to solve some sort of technical issue but without any payoff.

On the plus side, usually in the morning I have a sort of reset which I imagine is true for most people. I solve problems I was unable to at the end of the previous day. There's like, a graph of effectiveness from the start of the day to the end of it, and the start is usually where I resolve issues I created at the end of the previous day and it all goes downhill from there, only to repeat every day like some kind of Sisyphus punishment.