Well, I'm just a retired HN customer, albeit a long-timer on a Mac. Any connections I may have had are in Defense. lol
My wife has a Chromebook for work, but I don't let it on the local network because everything on it is network-access, meaning lots of pings and high network usage - as you've no doubt found out.
Not sure where those numbers are coming from, but my 2000W is running software version 7.3.0.13 with wifi software 0.10.10. You can check it from here using any machine on your local network. Ignore the fallback software version, that's what I think it uses out of the box or if it's completely reset.
Edit: Lol... Did I really call it a 9000W? #blastfromthepast No idea where that came from.
I haven't read back... have you tried powering the modem off then on (remove power at the brick or wall, wait a minute, then re-power it)?
Yeah, not denying it seem repeatable. Again, it seems like it's pretty much limited to some incompatibility with the Chromebook.
Seem to remember that years ago the HN engineers investigated a problem with Apple networking and were able to provide a simple environment variable to help solve it. Perhaps it's something simple like that for Chromebook. All these boxes are based on some distro of Linux so...