We are seeing this behavior in our new Orion 10.1.1, 10.2.2 and subsequent modules....
If you let a page sit too long then click on a submit button nothing happens. I especially see this when listing interfaces on a 6500. If I look at and select interfaces and hit submit right away it is ok. If I list the interfaces, take a phone call and let the page sit then go back to the page and take some action then hit submit - nothing. I have to do a page refresh and then work it.
I see similar behavior in the APM 4.0 page. If I test a probe then let it sit and then test again I get a blank page.
We are seeing this all of our Orion's. We are using IE7 and this was not an issue until we did the in place upgrade to 10 (nothing has changed in our browsers).
We saw this behavior in Orion 9.5x version but it was subsequently fixed in service packs.
Is anyone else seeing this problem?