Having an issue doing a WP_Query with post_content and category__and

I found the issue, I shouldn’t have been trying to filter on post_content, but rather ‘s’

e.g.

Array
(
[showposts] => 4
[paged] => 1
[s] => post
[post_content] => tree
[category__and] => Array
    (
        [0] => 6
        [1] => 15
        [2] => 28
    )

)

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