Have you completed your initial delivery before the deadline? If so, the big red "being late" counter after the revision request does not mean anything. It is an annoying feature of the platform that fiverr just does not care to fix. It depends on the volume of orders that you have completed in the last 60 days. For me personally, order completion rate dropped to 98% and now it has recovered to 99%. It might have influenced my search standings, but what happens, happens. The buyer seems to be a hassle to deal with, so you have to decide. The ratings stay on the platform forever, while completion rate does recover over time.