Ah, there you go. There might well be framing errors on that SerialUSB as well?
I’ll need to look through the BIOS some more. There are settings for some of the pins there, but I can’t recall if it was just for the 40-pin header? I’ll look later today. Maybe there’s something tweaky in there about the SerialUSB?
Did you see any framing errors on Serial1? I found all kinds of them there using the LA the other day, so I am wondering if you were able to confirm them on that port as well.
TB