This looks like a physical issue.
If this is a duplex optic try flipping the two fibers inserted on one side reversing the transmit and receive connections. I've seen issues where the pair gets flipping in the patch panel process across facilities or some cables are designed to do such a flip.
Also have a look at the optic details to see if there is a light or power level issue.
show interfaces diagnostics optics
show interfaces diagnostics optics xe-0/0/19