I had the exact same style of Timberland Pro "Pit Boss" model boots (Brown instead of Tan) fail in the exact same way. Just threw them away last week! I my case, the boots were bought over 10 years ago and used weekly.

I replaced with them with the exact same model again, because the price was half the competition, they fit me perfectly, they were comfortable to wear, and I thought 10 years service keeping me safe while mowing the lawn on weekends was more than adequate for the money expended. Maybe industrial users should consider something other than the cheapest option available.

No, that's normal for 'better' soles made of PU:

https://stories.hanwag.com/en/hiking-boots-sole-coming-off-w...