App web UI button

[Joda]

I am accessing my truenas scale install via a a FQDN. I am using NGINIX proxy manager to point subdomains to a few different apps that are installed as well as to the truenas admin UI. I set this up following Lawrence Systems video called “Self-Hosted SSL Simplified: Nginx Proxy Manager” except I am not using a wildcard cert. This seems to be working just fine overall, however sometimes when I go to apps and click on the web ui link for an app it attempts to direct me to {subdomain}.{domain}:{app port number} rather than {truenas local IP address}:{app port number} which fails to resolve (ERR_CONNECTION_REFUSED). It generally switches back to directing to the local IP on browser refresh. and this mostly seems to happen when first deploying an app. I suppose my question is, if it is possible to change the behavior of the webui links for apps, or if there is something else I am missing that might be causing this.