I'm not 100% sure, but I think this is incorrect.  I think with the switch cover completely removed the FASS switch contacts close again and the switch comes back on.

This is the first thing I thought of and I've tested it with both a standard Lutron dimmer and also a URC RF dimmer which I think both share the same configuration as RA2.  I don't have any RA2 dimmers in stock right now, but have a bunch due in tomorrow.