I dont know if its a new rule but that was exactly what my DSO asked for the OPT application (all previous copies of I-20s. I dont know for sure about what happens next because I am in the same phase as you. I am gonna file my paperwork after a couple of weeks.

Any thoughts on what USCIS looks for in the application for OPT?

I was told by my DSO that it was just standard stuff and they check if you have been in status the whole time ......