When a link with request parameters is clicked in the page editor the url is suffixed with ?mgnlChannel=desktop&mgnlPreview=true. It always starts with a question mark. If there's already request parameters present in the url this will fail making ?mgnlChannel=desktop part of the value of the last request parameter already in the url.

Steps to reproduce:

In firefox:

• Start the pages app
• Double-click demo-features
• Click Special templates
• Click Search Result in the left navigation
• Switch to preview mode
• Enter 'a' in the search field and press enter
• A search result is presented with 21 pages
• Click to change to page 2
• The search result is now empty

The reason is that the currentPage parameter sent to the server is: 2?mgnlChannel=desktop

The full url is:

http://localhost:8080/magnoliaAuthor/demo-features/special-templates/search-result.html?queryStr=a&currentPage=2?mgnlChannel=desktop&mgnlPreview=true

I believe the problem to be in PageEditorConnetor#init, in this block:

        eventBus.addHandler(FrameNavigationEvent.TYPE, new FrameNavigationEventHandler() {
            @Override
            public void onFrameUrlChanged(FrameNavigationEvent frameUrlChangedEvent) {
                final String platformId = getState().parameters.getPlatformType().getId();
                final boolean isPreview = getState().parameters.isPreview();
                final String queryString = "?mgnlChannel=" + platformId + "&mgnlPreview=" + isPreview;
                view.setUrl(frameUrlChangedEvent.getPath() + queryString);
            }
        });