Customer can't place orders - Stuck on shipping

Starting on May 1st, some of my customers can’t finalize their orders. They get stuck on the shipping options part of the checkout and cannot go further.

I have version 2.0.8 and I am using USPS real-time shipping rates. They are not international customers.

Any help would be really appreciated.




You should provide some examples, i suppose the problem in address, for default cs-cart customer everything works fine.