Problem on Compile an app on a web farm

i have a web farm with HAProxy and 3 Windows IIS web servers, im using gitlab ci/cd pipeline where im stopping IIS on server2 and server3, and deploying new packages on server1, after deployment finished im copying WebApp/conf/ and WebApp/Terrasoft.Configuration/Pkg as mentioned in documentation to server 2 and 3, but after enabling HAProxy, i need to manually do compile all in server 2 and server 3. what im doing wrong or what im missing