LB2120 - erases APN saved values repeatedly

The LB2120 seems to have many bugs in its current firmware.

One of the most important bugs is that although it will "save" a custom APN, it will completely erase it and reset the router within 5 minutes. This makes it effectively useless for all practical purposes.

I have tried contacting Netgear to report this serious problem, but they seem well insulated from outside contact.