nsh decap not working with ODL

[Howard Yu]

We are testing a simple SFC in OpenStack (Stein) + OpenDaylight (Neon) + Open vSwitch (v2.11.1). It's an all-in-one deployment.

client -> vm1 -> vm2 -> server are all on same compute node.

Build SFC through API:

$ openstack sfc flow classifier create --source-ip-prefix 10.20.0.0/24 --logical-source-port p0 FC1

$ openstack sfc port pair create --description "Firewall SF instance 1" --ingress p1 --egress p1 --service-function-parameters correlation=None PP1

$ openstack sfc port pair group create --port-pair PP1 PPG1

$ openstack sfc port chain create --port-pair-group PPG1 --flow-classifier FC1 --chain-parameters correlation=nsh PC1

Ping from client to server, but packet did not pass through firewall，open vswitch log show:
https://stackoverflow.com/questions/66208807/service-function-chain-nsh-header-transmission-issue

Is there something wrong with the instructions?
Or there may be some bugs in "networking-sfc"?

Thanks!