the configuration seems fine, no problem.
but there is one suggestion as I found from your configuration:
1. the tunnel address don't be same as physical interface. Otherwise there will be some wrong when query routing forwarding table of device.
2. the tunnel source address is local physical interface address and the tunnel destination address is peer physical interface address.
please modify the connecting interfaces addresses then try again.
If still not solved, you'd better create a ticket to support you, and provide detailed device information such as version/model/whole configuration etc.
And I am very curious why you establish vpn between them since it is p2p connectivity as you descripted, I think only need static routing then be ok.