I'm trying to use Matomo's Image Tracking feature in email instead of the usual JavaScript tracking. I generated the tracking pixel code from the Matomo admin interface and embedded it into my HTML. However, I'm not seeing any corresponding pageviews or hits in my Matomo dashboard (under Visitor Log or Actions → Pages). I've set an action_name in the tracking URL, but nothing shows up when the pixel is fetched (eg. using browser or wget - the pixel fetches fine).

<!-- Matomo Image Tracker -->
<img src=".php?idsite=123&rec=1&action_name=LimeSurveyInvitation"
     style="border:0" alt="" />
<!-- End Matomo -->

I expected to see pageviews with the title “LimeSurveyInvitation” in the Visitor Log or Pages report, but there's nothing. Are there any additional steps or configurations I need to enable in Matomo to get the image tracking pixel to record hits? How can I troubleshoot why these pageviews are not appearing?