I understand where you are seeing your xs
I own 3 of them with a 4th on the way
Try powering them off, wait 30 seconds, and power them on again
If that doesn't work, and the xs stay in the same exact spot
Try to only power the main blade, that has the small circuit boards plugged into it
And see if the xs remain in the same exact spot

Randomly when I reboot them I see some random xs
If I keep clicking miner status, the xs to away as the unit heats up
If you read the setup link, it did say the unit sometimes shows xs but there is nothing wrong
Of no matter what you do (after you only power one blade) the x is always there
In the same exact spot, THEN you might have a problem