Disabled people tend to get fired preemptively, regardless of performance, when their disability is discovered. It's illegal but it happens all over the place: bosses see everyone with a medical problem as a potentially unrealiable time bomb. So they tend to have a lot of involuntary "job hopping". And, not surprisingly, it takes them longer to find new jobs after getting fucked over.

This can be concealed to some extent if people only put the years of employment on their resume. Which is why the resume portals ask for months. It's a way of figuring out if someone has a history of getting flagged for depression, anxiety, or long COVID and then PIP'd over it.