The following actions may resolve or at least help isolate the root cause of the problem:
Note1: there are a few cards that do not have Hot Swap button and you will not need to take that step for those cards.
if the last option works (I mean, the card works in a different chassis), we need to consider RMA just the chassis controller.
Please raise a ticket with support and provide the details of your test using the guidance above, provide as much details as you can as well as all possible logs (Diagnostic Report, Chassis Logs, etc)
If you're signed in to the CSC, you can access the Spirent TestCenter Hardware Reference for further details.