diff --git a/packages/plugins-common/context.ts b/packages/plugins-common/context.ts
index 4c3d8a1477..8e94ef8843 100644
--- a/packages/plugins-common/context.ts
+++ b/packages/plugins-common/context.ts
@@ -40,11 +40,13 @@ export function createContext<Config extends PluginConfig = PluginConfig>(
     invalidations.forEach(cb => cb())
   }
 
-  async function scan(code: string, id?: string) {
+  async function extract(code: string, id?: string) {
     if (id)
       modules.set(id, code)
+    const len = tokens.size
     await uno.applyExtractors(code, id, tokens)
-    invalidate()
+    if (tokens.size > len)
+      invalidate()
   }
 
   async function reloadConfig() {
@@ -75,7 +77,7 @@ export function createContext<Config extends PluginConfig = PluginConfig>(
     filter,
     reloadConfig,
     uno,
-    extract: scan,
+    extract,
     config,
     configFilepath: filepath,
   }
diff --git a/packages/vite/src/modes/global/dev.ts b/packages/vite/src/modes/global/dev.ts
index c92e86b348..96c83da357 100644
--- a/packages/vite/src/modes/global/dev.ts
+++ b/packages/vite/src/modes/global/dev.ts
@@ -23,7 +23,6 @@ export function GlobalModeDevPlugin({ uno, tokens, onInvalidate, extract, filter
         const mod = server.moduleGraph.getModuleById(id)
         if (!mod)
           continue
-        lastUpdate = Date.now()
         server!.moduleGraph.invalidateModule(mod)
       }
     }
@@ -32,6 +31,7 @@ export function GlobalModeDevPlugin({ uno, tokens, onInvalidate, extract, filter
   }
 
   function sendUpdate() {
+    lastUpdate = Date.now()
     for (const server of servers) {
       server.ws.send({
         type: 'update',