That's a great point. What caused it, and has that been addressed?

OP might want to think about that (if they haven't already) for their own well-being, apart from job prospects. There could be some issue that interferes with being able to handle work in a healthy way, and they can power through it... until they can't anymore. (And then comes separating themselves so time allows them to recover.)

If so, then by addressing that issue, maybe they can not only prevent the same outcome but also have a better time of it in future jobs. A healthier, more sustainable relationship with work, etc.

Barring some serious illness, neither I nor the doctors I've been consulting see any future events of such sort. The only thing I've worked on these last 4 years is getting to a point of career-sustainability. All I can do is tell whoever asks that I won't be needing such an extended break and maybe, if pushed, get a doctor's note signing off on my health. But that seems a little school-like :)