Can Prudential cancel or deny your claim if you are approved for social security disability benefits?

I was denied Prudential LTD benefits after missing a reassessment hearing that was required because Prudential’s doctors did not feel I was still disabled. However, two months later Social Security granted my disability using the same medical opinions Prudential had. I was so fed up with how Prudential handled my case that I just didn’t appeal. After reading comments from others I am beginning to believe this happens all the time. My question is, can Prudential cancel or deny your claim if you are approved for social security disability benefits? Had I appealed, would I still be hostage to meeting there satisfactory guidelines for disability while receiving Social Security Disability Benefits?