looks like I have a similar issue as in the previous ticket.
On a local test site I set a page limit of 6 gallery items in gallery settings, left the total items field empty and added a load more button. I added a total of 9 images – 3 images in three categories. When loading all 9 images with load more button and then using the filter to narrow down the selection, when selecting the “all” images filter, only 6 images are being shown – the number set in ‘items per page’ without any load more button. That seems clearly like an error in the code.