New Model F: Intermittent Fault

[Coeus]

I have a new Model F which is demonstrating an intermittent fault in which a whole bunch of keys stop working. Here is the output of the VIal Key Matrix Test:

Vial Matrix Test

Screenshot From 2026-02-26 14-55-29.png (10.4 KiB) Viewed 18 times

This first happened a few days ago. At the time I didn't have time to do anything about it, so I unplugged the keyboard, put it aside, and used another one. Yesterday, I reconnected it with the intention of seeing what diagnosis I could do and, to my surprise, it worked perfectly - all keys working. Later the same day, the fault had reappeared. Unplugging it for a few minutes and plugging it in again solved the issue and, as I left it last night, it was working. This morning, the fault was back.

Are all the keys in that test result on the same row or column of the matrix and, if so, what could be the reason that line stops working after a while, only to work again after the power has been off for a few minutes? I know there is an auto-calibration but why would that drift after the KB has been on for a while?

P.S. I would try to see what the levels are, but I can't find a working version of the the tool. First of all, it isn't clear which controller this keyboard has, though it seems like it is probably xwhatsit. Then, the only PC I can install arbitrary software on is running Linux and the package linked from the manual seems focused on Windows and MacOS. QMK is an open source project but on that website, it does not seem to know about the New Model F.