Taxonomy pages do not allow custom collections

I am trying to pull together a custom collection of all item pages (articles in a blog):

{% set my_pages = page.collection({
'items': '@root.descendants',
'order': {
'by': 'random',
'dir': 'desc',
},
})
.ofType('item')
%}

I would assume that no matter on what page I execute this and then run
{{ dump(count(my_pages)) }} - I always get the same count (in our example, let's say I have 50 item pages which have different categories). However, the behavior is a bit different.

• on the blog page it shows the correct count of pages (50)
• on an inidivudal item page, it also shows correct count of pages (50)
• however, if I run this code on a taxonomy listing page: domain.com/blog/category:blue - the count only shows the number of items in category blue (ex: 5)

Do I misunderstand how my custom collection works or do you know why it will not show count 50 on the category page?

thanks much

@pamtbaau - wow, thanks a lot. It works like a charm.

Perhaps this is something that should be part of the documentation for Page Collections since it is a little counter-intuitive to put some hidden filter onto a custom made collection.

Btw, you are right about the title, but I cannot seem to change it anymore.