I have same problem.

RB4011iGS+
r2
factory firmware 6.45.8
rOS v. 6.47

It was not possible to log in to it. But otherwise it worked in this state for over 14 days. We had to restart manually yesterday.

I would like to ask about gpen21. Does the communication between ether2 and SFP work? I can't get it up and running. Between ether1 and ether2 it's OK. It's also OK between SFP and ether1, but when I want to communicate directly between ether2 and sfp it doesn't work.

you can use udp to test it in some situation ,tcp has some problem . udp protocol we have already tried and no difference. Linking routers is via multiple jumps (wireless and cable) using one "vlan". But this problem has already occurred to us even when connecting to wireless. Do you thin...