Netflow traffic is not sent through a Macsec tunnel.

Having a problem of Netflow traffic not being sent through a Cisco macsec tunnel.
Illustration:

I suspect that the Netflow traffic is sent out unencrypted (from cat3650) and is dropped by the receiving peer (cat4500).

About to open a TAC case.

-update-

Opened a TAC case and proved that netflow was sent unencrypted.
A new bug was generated: CSCuv15264 3650 Netflow is not being encrypted by MACsec
No solution at the moment.