Quoted from lookyloo:I was surprised too. Mine is a 2017. The extreme corners of the backbox scrapped by the arched opening of the trunk. I suspect the problem was that the middle seats are at a slight incline when folded down, which starts to lift the pin ever so slightly once it's almost all the way in. I don't know if I had flipped the seats forward if it would have made the incline a non-issue, but it would have likely created a problem for the length given the pre-mounted topper (and my lack of tools in the car to remove it).
I have a Honda Pilot 2020 as the current pin hauler. I do agree that the angled arch top is a little tight, but I've fit a data east and a WPC in there no problems -- no scrapes in other words. We have captains chairs on the 2nd row instead of the bench seat, not sure if that matters or not.