Mac Commands Encrypted with AppSKey instead NwkSEncKey in Lorawan 1.1 Packet

[kalik1]

Reading test File phypayload_test.go, from row 374, it looks that Packet is encrypted with AppSKey instead of NwkSEncKey as stated in the Lorawan Specification 1.1 (Page 25 / 26).

When Port is 0 and there are Mac Commands in payload, shouldn't be use NwkSEncKey instead of AppSKey? or am I missing something ?

Kalik1