Is it normal that with react-router build Vite plugins are being executed 3 extra times?

[neochief]

It's not documented anywhere, so I'm not sure whether it's intended.

Suppose I have a simple Vite plugin (in minimal template https://github.com/neochief/rr7-vite-plugin-run-n-times):

https://github.com/neochief/rr7-vite-plugin-run-n-times/blob/main/test-vite-debug.ts

export function testViteDebug() {
    return {
        name: 'test-vite-debug-web',
        buildStart() {
            console.log("test-vite-debug-web\n");
        },
    }
}

https://github.com/neochief/rr7-vite-plugin-run-n-times/blob/main/vite.config.ts

import { reactRouter } from "@react-router/dev/vite";
import tailwindcss from "tailwindcss";
import { defineConfig } from "vite";
import tsconfigPaths from "vite-tsconfig-paths";
import {testViteDebug} from "./test-vite-debug";

export default defineConfig({
  css: {
    postcss: {
      plugins: [tailwindcss],
    },
  },
  plugins: [reactRouter(), tsconfigPaths(), testViteDebug()],
});

When I run react-router build, I get this:

➜  minimal ./node_modules/.bin/react-router build                                                              
test-vite-debug-web

test-vite-debug-web

vite v6.0.11 building for production...
test-vite-debug-web

✓ 42 modules transformed.
build/client/.vite/manifest.json                  1.54 kB │ gzip:  0.42 kB
build/client/assets/root-C19NsiIX.css             5.42 kB │ gzip:  1.62 kB
build/client/assets/with-props-lHqJqqlJ.js        0.35 kB │ gzip:  0.21 kB
build/client/assets/home-OovboCvf.js              0.42 kB │ gzip:  0.30 kB
build/client/assets/root-Jl5ITYCp.js              0.84 kB │ gzip:  0.49 kB
build/client/assets/chunk-K6AXKMTT-CyqaD2Pz.js  105.60 kB │ gzip: 35.84 kB
build/client/assets/entry.client-BhwQoBZT.js    179.29 kB │ gzip: 56.97 kB
✓ built in 598ms
test-vite-debug-web

vite v6.0.11 building SSR bundle for production...
test-vite-debug-web

✓ 7 modules transformed.
build/server/.vite/manifest.json               0.23 kB
build/server/assets/server-build-C19NsiIX.css  5.42 kB
build/server/index.js                          6.23 kB

The output above shows that the plugin was executed 5 times, whereas I'd expect it to run only 2 times (compared to vite build).

Is this an expected behaviour?