So I finally got around to swapping out the data bridge card. It took a while to get the replacements because I made the mistake of trying to communicate with them via their support system.
In case it wasn't clear, the only way you can get support is via Telegram. I should have paid attention to Phil's post about that, but I didn't have Telegram and didn't want to install it. Learn from my mistake and just use Telegram.
Anyway, I swapped out multiple new bridge data cards because they sent me several. But none of them made a difference.
But since I originally swapped hash boards and the problem stayed with the slot, not the hash board, I'm still convinced this is a data problem.
Perhaps my ribbon cable is bad? It could also be the controller, I suppose. But replacing the cable would be the first thing that I try.
Anyone know a source for replacement cable? I don't have one in my junk pile. Too bad those extra S9 data cables I have aren't 2 x 11.
Also, Phil you were asking me to snag you an extra data bridge card. I've got extras so I can do that, but it might be better to figure out where the fault really is before I send you a card that isn't tested.