Bug with 3rd party site integration? (rightmove/zoopla/gumtree)

I just put my first advert on the open rent site. I uploaded 11 images and all 11 are showing on the openrent site. But on the rightmove it’s only showing 10 and gumtree is showing 8

I’m guessing the 10 and 8 are limits for each service which I fair enough. But the the 1 image that didn’t make it over to rightmove is the image I chose as my “cover image” which is obviously the 1 image I really did want to go onto these 3rd party services.

Really the images should go onto these 3rd party sites in the order you list them in openrent. Or is this a specific bug that for some reason your first/cover image is getting excluded?

Either way very disappointing