last time I had a double GFCI protected circuit, both of them managed to trip... receptacle for the washing machine, and the breaker in the panel. Did not take any longer to troubleshoot, as soon as the receptacle would not reset, and was check with a non-contact tester, I knew there was no power going to it. Opened the panel, found the trippef GFI breaker, reset it, then reset the GFCI receptacle.
For the average homeowner though with little to zero electrical troubleshooting skills, dual protection is just going to confuse them.
Even seen a few cases of triple protection, with a hair dryer with an LCDI cord plug into a GFCI receptacle on a GFCI breaker. you would think that getting a drop of water on a running hair dryer will cause a black hole to form and swallow the Earth or something