Almost any problem with the "Super" Hub is a known issue, unfortunately.
Currently, the only half-reliable operation for Super Hub with R36 is in modem mode (where you follow it with your own router). Even then, I have to power cycle my Super Hub every few weeks - and, believe me, I'm doing well!
There is supposed to be an even newer firmware than R36 available in the (near?) future which will allegedly fix all the problems that R36 was supposed to fix from earlier releases, and those it ended up causing...