The remix serve port is getting changed after changes in any file

Question

hi so i recently updated to remix 2.3 from remix 1.4 and the current issue that i have is whenever i change anything in any file the localhost port of remix serve changes so for example when i started the server with npm run dev it started on http://localhost:63642 then i made changes in a component called title.tsx and it got changed to

[remix-serve] http://localhost:64000 (http://192.168.0.204:64000)
 info  app server ready (3.8s)
 info  hmr

my package.json scripts:

  "scripts": {
    "build": "remix build",
    "dev": "remix dev",
    "start": "remix-serve build",
    "test": "jest",
    "typecheck": "tsc"
  },