MESH networking can mean three things:
-HARDWIRED APs that work as a mesh for hand-over
-Wireless EXTENDERS that repeat the signal
-A Hybrid of the two.
As a
you should already know the answer as to why two of the above are not proper setup in general.
If by MESH you mean the one that is 'proper' then that as such isn't an issue.
ORBI router in particular is know to have C4 devices fall off-line or not ID at all (multi-cast, SDDP, SIP and UPnP issues if memory serves)