private void reloadPage(URL helpURL) {

		if (!(mainHB instanceof DockingHelpBroker)) {
			// not our broker installed; can't force a reload
			return;
		}

		// Let the URL dictate where the page scrolls to.  If we do not do this, then there is an
		// odd effect of having the page load and then jump to a previous location.
		boolean preserveLocation = false;
		((DockingHelpBroker) mainHB).reloadHelpPage(validateUrl(helpURL), preserveLocation);
	}
This forces page to be redisplayed when location has not changed
Ghidra/Framework/Docking/src/main/java/docking/help/HelpManager.java