Traceroute going via Secondary instead of Primary in HA cluster

[nfern]

I have 2 netgate routers - master 10.x.x.196 and secondary 10.x.x.197- CARP IP configured is 10.x.x.189. CARP status shows correctly.
When i traceroute from from my servers, which go via pfsense to my clients, i notice that traffic goes via 10.x.x.197 instead of 10.x.x.196

Tracing route to xxxxxxxxxxxx.local [10.x.x.157]
over a maximum of 30 hops:

1 <1 ms <1 ms <1 ms 10.x.x.197
2 <1 ms <1 ms <1 ms xxxxxxxxxxxxxx.local [10.x.x.157]

Trace complete.

[nfern]

When i try to ping the other way around, it goes via the correct path via primary 10.x.x.196

Tracing route to 10.x.x.41 over a maximum of 30 hops

1 <1 ms <1 ms <1 ms 10.x.x.196
2 <1 ms <1 ms <1 ms 10.x.x.41

Trace complete.