[ICD follow-up] If we are getting a check-in, the server thinks we have no subscription to it, right? Might be worth a followup to think about the logic here.

[yunhanw-google]

          That said, is this the right thing?  If we are getting a check-in, the server thinks we have no subscription to it, right?  Might be worth a followup to think about the logic here.

Originally posted by @bzbarsky-apple in https://github.com/project-chip/connectedhomeip/pull/30812#discussion_r1420833155