Not all images listed in sitemap part 2

So here I was waiting patiently for a reply to my follow up to my initial ticket posted here but apparently the Rank Math bot closed the thread as apparently I did not post a follow up, but I did and it was ignored 🙂

so here it is again

Hi there, great plugin, enjoying it immensely – however I’ve recently been paying attention to images in the sitemap I’ve been using (ie https://svenstudios.com/sitemap_index.xml ) generated by rankmath. I’ve noticed some of my posts have listed all the images on the post, and other have not. An example of one of the pages not listing all the images is https://svenstudios.com/2019/09/glanville-hall-wedding-ashleigh-corey/

Here’s a screen shot of my post sitemap showing a larger number next to some posts, and only 1 (presumably the featured image) next to others, when most, if not all of my posts have 40+ images. https://svenstudios.com/crap/screens.jpg

Images in Sitemaps and Include Featured Images are both set to ‘on’

in the last thread I was informed that it wasnt listing images in the sitemap due to the images not being hosted locally – which they now are, and yet the problem persists. Any idea as to why?