Wireguard-kmod wont start with certain configs

[drdownload]

I have 3 locations, all running the latest version of opnsense 21.7.3_3, all with wireguard plugin 1.7 and wireguard-kmod 0.0.20210606_1

Site A (10.23.9.12 as Tunnel-Address)
Peer and Handshake to Site B + C works

Site B (10.23.9.80 )
Peer and Handshake to Site A
Peer listed for C

Site C (10.23.9.95 )
Peer and Handshake to Site A
Endpoint B need to be disabled to start Wireguard, with B enabled

If I enable Endpoint B on Site C it wont start. I had the same behaviour on Site B with Endpoint C, I have the feeling but suddenly its reversed.