Yahel - Yessir, it arrived yesterday evening. For a time, I tried coming up with a political way of putting 'okay now what' in a forum post; but decided to and have been attempting to familiarize myself with this unit's particular case, rather than ask that either of you reiterate.
My understanding thus far is that it's your login: prompt i'm looking at, may be inaccurate from some of my reading. The front panel does look like a Chris tower, but the hostname doesn't look like one of his, could go either way. Ordinarily, I would wipe the config and start from bare metal, but that risks dislodging whatever gremlin we're (not) seeing (yet), can you PM me credentials?
Then we've got to figure out a way to get my eyes on what you're seeing - if you have some suggestions, i'm all ears- otherwise it's me, my noggin, and some iperf3 streams, and my noggin is mostly questions.. Standard MTU? any qinq encapsulation? vlans? ambiguity is our enemy, as is a dearth of detail
update upon open chassis examination:
device was reworked 8/23 by dan at isp technologies - I see he replaced the primary SoC and clock, along with 2 current sensors and their attendant shunt resistors and line magnetics. Unclear if protection diodes were also reworked at this point, i see no clashing date codes or solder joints that would indicate they were, every time *I* leave those I end up replacing the SoC again, though
I've begun to feel as though we're involved in a conversation that should be between you and he at this point, am following up with him privately as well (yelling at him for getting silicone between the SoC and board

you're supposed to mask the schmoo or it complicates subsequent removal!...)
Guess we'll keep getting it labbed up, have it handle my barnnet shot; one thing i will say is i'm no longer sure who's problem we're finding