An analytics tool is missing on some pages, loaded twice or fires before consent

Add the tag to the pages that miss it

1. Check the template_id of the pages in the evidence. Pages of one template usually miss the tag together.
2. Add the tag or the tag manager snippet to that template, in the same way the other templates load it.

How to check: Reload a page from the evidence with the network panel open: there is one request to the tool.

Remove the second copy of the tag

1. Search the page source and the tag manager container for the script address in the evidence.
2. The usual pair is the template and the tag manager. Keep one and remove the other.

How to check: Reload a page from the evidence with the network panel open: the script is requested once.

Hold the tag until consent

1. Find where the tag is loaded: in the template or in the tag manager.
2. Make it wait for the consent signal of your consent tool.

How to check: Open a page from the evidence in a fresh browser profile with the network panel open: no request goes to the tool before you accept.

Load the tag once, everywhere, after consent

1. Check the template_id of the pages in the evidence.
2. Load the tag in one place only, on every template, behind the consent check.

How to check: Reload a page from the evidence with the network panel open: one request to the tool's script, and none before you accept.

After a server upgrade to PHP 8.1, a code snippet plugin found an error in an unrelated line of the snippet that also held the Google Analytics tag, and quietly set the whole snippet to draft. The site recorded no analytics data for three days.

Source: WP Remote blog, 3 November 2023