Track Site Search not possible because of invalid URL

Support & Bugs
1

Goal

On my Website I have a Search whithout Parameters in the URL. I want to track the Seachwords via Matomo for further analytics.

Important Infos
On the Website a Matomo Tag Manager and the Matono JavaScript is included. The Matomo JavaScript is only there for the OnSite Seachtword Tracking.

Problem

[2025-05-07 06:19:49] piwik.DEBUG: Detected Site Search keyword 'TestWord'.  [] {"class":"Actions","request_id":"2acda"} 
[2025-05-07 06:19:49] piwik.DEBUG: NOTE: The Page URL was changed / removed, during the Site Search detection, was 'https://example.de/', now is '' [] {"class":"Actions","request_id":"2acda"}

I already checked:

  • Latest Matomo version (5.3.2)
  • My Testing IP Adress was not ignored
  • Site Search Enabled: Admin > Websites > Site Search is enabled
  • Tracking Request gets triggerd and searchword is sent to /matomo.php?search=Revier
  • In enabled Tracking Debug there is show, that the parameters are set correctly
  • The URL in the request is a valid absolute URL corresponds to Tracking URL in Matomo Admin
  • Before the search, Matomo is correctly registering page view actions with valid URLs
  • There are no JavaScript Errors
  • Tested in inkognito Browser

What I tried and did not solve the problem

  • Setting a custom URL right before the trackSiteSearch
  • Removing Matomo Tag Manager Script

Concrete implementation

<header>
    <!-- Matomo Tag Manager -->
    <script>
        var _mtm = window._mtm = window._mtm || [];
        _mtm.push({'mtm.startTime': (new Date().getTime()), 'event': 'mtm.Start'});
        (function() {
            var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
            g.async=true; g.src='https://matomo.doubleslash.de/js/container_abcdef.js'; s.parentNode.insertBefore(g,s);
        })();
    </script>
    <!-- End Matomo Tag Manager -->

    <!-- Matomo JS Tracking -->
    <script>
        var _paq = window._paq = window._paq || [];
        _paq.push(['requireConsent']); // for borlabs cookie banner
        (function() {
            var u="https://example.de/";
            _paq.push(['setTrackerUrl', u+'matomo.php']);
            _paq.push(['setSiteId', '1']);
            var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
            g.async=true; g.src=u+'matomo.js'; s.parentNode.insertBefore(g,s);
        })();
    </script>
    <!-- End Matomo JS Tracking -->
</header>

<body>

<input class="jet-search-filter__input jet-input-not-empty" type="search" autocomplete="off" name="query" value="" placeholder="Welches Thema interessiert Dich?" aria-label="Durchsuche Beiträge" tabindex="0">

<script>
  jQuery(document).ready(function () {

	(function waitForMatomo(callback) {
		if (window._paq && typeof window._paq.push === 'function') {
			callback();
		} else {
			setTimeout(function() {
				waitForMatomo(callback);
			}, 100); // prüft alle 100ms erneut
		}
	})

	(function() {
		const searchInput = document.querySelector('input.jet-search-filter__input[type="search"]');
		if (!searchInput) return;

		let debounceTimer;
		let lastTrackedSearchWord = '';

		searchInput.addEventListener('input', function() {
			clearTimeout(debounceTimer);
			const searchWord = this.value.trim();
			if (searchWord === '') return;

			debounceTimer = setTimeout(function() {
				if (searchWord === '') return;
				if (searchWord && searchWord !== lastTrackedSearchWord) {
					lastTrackedSearchWord = searchWord;
					console.log('trackSiteSearch:', searchWord, ' on ' + window.location.href);
					_paq.push(['trackSiteSearch',searchWord]);
				}
			}, 1000);
		});
	});

});
</script>

</body>

Do you happen to know what could be causing this?

Or how I can proceed here to determine the actual source of the error?

Perhaps you have already had this problem or a similar one and can help me here.

Thanks, Amelie