>>282103237
Next ep trailer showed that Shand and probably some other corpos, likely including Rock, know his civilian identity already. They have already joined with each other and the commission in a plan to take X down a few eps prior.
I guess they found him out since Rock noticed how emotional and personal X was via clutching Smile's pendant. Rock likely followed Smile's footsteps and found that he visited someone close to him just before he died who is also facially similar to X. Hence, them connecting the dots.