In my 15 years of experience, I see people get people get stuck when they need to ask for help in much greater prevalence than the other categories. This is often coupled with a perspective drawn from toxic meritocracy - those who work harder get more done. They are often sides of the same coin.
What it looks like practically is a team member whose tasks start to slip, mutate, and start to get called done without anything actually delivering the goods. It takes a supportive team or an active manager to stop and recognize what's happening.
Depending on the individual, either ego or fear are the primary drivers of the action and while everyone has their own demons to wrestle, those who make great contributors can recognize their demons and take steps to confront them. Mid devs often don't, can't, or won't.
What it looks like practically is a team member whose tasks start to slip, mutate, and start to get called done without anything actually delivering the goods. It takes a supportive team or an active manager to stop and recognize what's happening.
Depending on the individual, either ego or fear are the primary drivers of the action and while everyone has their own demons to wrestle, those who make great contributors can recognize their demons and take steps to confront them. Mid devs often don't, can't, or won't.