Wireguard - 9th peer not being added to wg1.conf

[aptos]

I have 8 peers working correctly but adding a 9th in the web GUI does not add an entry in /usr/local/etc/wireguard/wg1.conf

I can manually add the 9th entry to wg1.conf, but as soon as I make any changes in the web GUI the 9th peer is removed from wg1.conf again.