Banners Not "Rotating".
Sometimes, when a page containing a banner delivered from Revive Adserver is loaded, the same banner that was showing on the page before reloading is shown again.
There is no troubleshooting process for this - as Revive Adserver is working as expected.
Revive Adserver is not a banner "rotator". It does not have any capabilities to ensure that it will display a different banner to a user every time they visit a page.