TL;DR: You got promoted or you wanted to get promoted. You decide you want to make a bigger project to show ambition, advance your career and whatnot. You embark on making some grand project, disappearing from view. This often leads to you getting stuck with something, falling behind and various negative effects like getting a PIP or becoming depressed.

His prescription to avoid this is to keep checking in and show some progress on something every day so you don't lose touch.

(My analysis: I don't think this is particularly a senior engineer problem, to me it just reads like ADHD-coded problems with time and interests)