Amazon Non Software Development Engineer interview questions

I applied online. After that I got an email from the recruiter about an Online Assessment Test. I took the test, it was 20 min and about debugging skills and how to read others code and fix bugs. After that I received an email to move to the second round. I got a phone interview from one of their engineers. The telephone interview was mostly about data structures and algorithms and about my background. After less than a week I received the offer. I signed it and sent it back to them. However, after more than one month they retracted it claiming that Amazon does not apply for export control licenses for candidates from embargoed countries. I was just shocked that it took them this much time to realize that. It is disappointed for them to do that after we went this far with the process. I asked for an exception or placement in a team that does not require export licenses, but there was just no hope. I missed two interesting opportunities because of that.