ESP-NOW with encryption enabled

[iParcelBox]

I'm unable to get ESP-NOW working with encryption enabled. It works fine when encryption is turned off, but as soon as I set .encrypt=true when adding the peer, my send_cb function still returns 'OK', but the message is never received on the recv_cb on the other device.

I'm setting peer.lmk to be exactly the same on both devices.

If anyone can point me in the right direction it would be much appreciated!