Sorry, but I would not call this problem a bug but a User Error :-
Partly because cleaning the registry rarely gives any benefit and sometimes causes problems,
and therefore it is better to NOT fix any issue unless you have analyzed and determined what the key is related to ;
BUT MOSTLY because I recognize that "...\RunOnce" is typically added during an installation or update of an application which REQUIRES completion upon the NEXT start-up of Windows,
and normally the completion code will conclude by deleting the "RunOnce" keys so that it does NOT run on the next start-up.
I suspect that in this case FLASH was updated and then the user cleaned the registry before shutdown / restart and as a result Windows did not run the intended completion actions upon start-up.