Session Host Deployment

Hi,

I have a session host pool which I am able to add members to which are deployed from my template. I have had a host fail deployment and I've deleted from the pool. The issue I am having is deploying another host to the pool RAS will try and use the previously failed machine name/ID and this then also fails deployment, the status is stuck in 'Provisioning' then changes to 'Not Applied', logons are enabled but will error trying to connect and launch an application.

If I leave the failed host in the pool and deploy a replacement, this will deploy correctly with a new machine name/ID. Is there any way I can prevent this during deployment?
Many Thanks.