TS/SCI FS poly suspended

My former employer placed me on administrative leave and suspended my security clearance as “standard protocol.” Several months after I was cleared to return to work in full capacity I was requested to return to the office where I was informed that I was being separated immediately. This was the day before I would have been converted to career status. I was also told that the agency won’t lift the suspension on my security clearance and never has to, but another agency could reissue a new security clearance. I will add that I held career status within the same department, but a different agency. My last agency said all previous federal employees are required to forgo their “rights” and must serve a new probationary period, identical to new government employees. Simple question, can anyone identify what specific laws and policies were violated by my previous employer?