RBR50 strange behaviour

My router all of a sudden started behaving strangely. Initially, i was able to ping, but wasnt able to access the web administration. Also it was not resolving any DNS queries. After a couple of power recycles, the web administration page finally loaded up, but still has some strange behavior:

1. Going to the firmware update page brings up a long lists of devices (I only have two satellites)

2. Going to the Attached Devices page somtimes causes a 500 Internal Server error

I even uploaded the latest firmware again, but the issue still there, although the Internal Server Error is much less frequent now