Peer tables don't synch on clear

[Franks Andy (IT Technical Architecture Manager)]

Hi all,
  Haproxy 1.6.13
  I've checked the documentation again but can't see an option for this.
We sometimes clear backup path server use for individual connections and whilst 
the peers synchronisation works for new connections, it doesn't clear on the 
secondary peer node we're using.
Is this by design or an option I'm not seeing?
Thanks
Andy