o:graphicImage with dataURI="true" frozen programm via update - omnifaces

Question

I have the following code.
The remoteCommand is executing after 5 seconds the method and update the h:form.
<h:form>
<p:remoteCommand name="checkPageRc" autoRun="true"
resetValues="true" async="false"
delay="5000"
actionListener="#{previewPhotoboothProfileController.doLoadCurrentPage(previewPhotoboothProfileController.selectedPhotoboothPage)}" />
</h:form>
<h:form id="previewPageForm">
<o:graphicImage dataURI="true"
rendered="#{previewPhotoboothProfileController.photoboothTemplate.photoboothCurrentSession.singlePictureOutput != null}"
value="#{storageOutputHelperController.loadImageByByteArray(previewPhotoboothProfileController.photoboothTemplate.photoboothCurrentSession.singlePictureOutput)}"
cache="false" />
</h:form>
My backend bean:
#GraphicImageBean
public class StorageOutputHelperController implements Serializable {
public byte[] loadImageByByteArray(byte[] bytes) throws IOException {
LOGGER.info("START loadImageByByteArray");
try {
// Falls Null
if (bytes == null)
return Utils.toByteArray(Faces.getResourceAsStream("/resources/images/no-photo-icon.png"));
LOGGER.info("END loadImageByByteArray");
return bytes;
} catch (Exception e) {
LOGGER.error(ExceptionUtils.getFullStackTrace(e));
return Utils.toByteArray(Faces.getResourceAsStream("/resources/images/no-photo-icon.png"));
}
}
}
previewPhotoboothProfileController.photoboothTemplate.photoboothCurrentSession.singlePictureOutput is already a byte array.
The problem is now, that the o:graphicImage will be updated, but only after 10 seconds and it the programm / thread is frozen.
It seems that the update from the p:remoteCommand for the h:form is the issue.
If I´m using <o:graphicImage dataURI="false" I cannot see this behaviour from the frozen window / programm but than the image is not showing.
Is this a known issue or is there something wrong from my end?
Edit:
Ok, it seems like the issue is in my SWT Browser screen which I open like this:
Display.getDefault().asyncExec(new Runnable() {
public void run() {
Display display = Display.getCurrent();
final Shell shell = new Shell(display);
Rectangle clientArea = Display.getCurrent().getClientArea();
shell.addListener(SWT.Traverse, new Listener() {
#Override
public void handleEvent(Event event) {
if (event.character == SWT.ESC) {
event.doit = false;
shell.close();
}
}
});
shell.setSize(500, 500);
shell.setFullScreen(false);
shell.setLocation(0, 0);
GridLayout gridLayout = new GridLayout();
gridLayout.numColumns = 3;
gridLayout.marginWidth = 0;
gridLayout.marginHeight = 0;
shell.setLayout(gridLayout);
final Browser browser = new Browser(shell, SWT.NONE);
browser.setJavascriptEnabled(true);
GridData data = new GridData();
data.horizontalAlignment = GridData.FILL;
data.verticalAlignment = GridData.FILL;
data.horizontalSpan = 3;
data.grabExcessHorizontalSpace = true;
data.grabExcessVerticalSpace = true;
data.widthHint = clientArea.width;
data.heightHint = clientArea.height;
browser.setLayoutData(data);
shell.open();
browser.setUrl("http://localhost:" + Constants.SERVER_PORT
+ "/portal/myurl);
}
});
Any idea, why the program is frozen?
If I check this in my local browser, it seems it´s working fine