Issue with optics

Hey guys,

Wondering if you could assist me with an issue im having.

Im having an issue with 2 x 25G SR optics between an NCS 540 and Nexus 9k. I am seeing light on both sites, but for some reason, the optics don't come up. When I loop the optics on each device, they come up. Also, when I connect the optics to the same NCS or different NCS they come up, and when I connect the optics the same Nexus or different Nexus they come up. It's only when I patch the optics between the 9k and NCS I have this issue.

Have anyone seen this issue before?

Cheers,