diff --git a/data/schema.json b/data/schema.json
index 52b99173515..b667fa2ea21 100644
--- a/data/schema.json
+++ b/data/schema.json
@@ -537,7 +537,7 @@
     },
     "coc.preferences.currentFunctionSymbolDebounceTime": {
       "type": "number",
-      "scope": "language-overridable",
+      "scope": "application",
       "description": "Set debounce timer for the update of b:coc_current_function on CursorMove event",
       "default": 300
     },
diff --git a/doc/coc-config.txt b/doc/coc-config.txt
index 53ace94fbed..fe12d6c4335 100644
--- a/doc/coc-config.txt
+++ b/doc/coc-config.txt
@@ -1530,7 +1530,7 @@ Preferences~
 	Set debounce timer for the update of b:coc_current_function on CursorMove
 	event
 
-	Scope: `language-overridable`, default: `300`
+	Scope: `application`, default: `300`
 
 "coc.preferences.enableLinkedEditing"			*coc-preferences-enableLinkedEditing*
 
diff --git a/src/handler/symbols/index.ts b/src/handler/symbols/index.ts
index 462a8b9e2e2..f81f0f2605f 100644
--- a/src/handler/symbols/index.ts
+++ b/src/handler/symbols/index.ts
@@ -37,6 +37,7 @@ export default class Symbols {
       return buf
     })
     this.outline = new Outline(nvim, this.buffers, handler)
+    const debounceTime = workspace.initialConfiguration.get<number>('coc.preferences.currentFunctionSymbolDebounceTime', 300)
     let debounced = debounce(async (bufnr: number, cursor: [number, number]) => {
       if (!this.buffers.getItem(bufnr) || !this.autoUpdate(bufnr)) return
       let doc = workspace.getDocument(bufnr)
@@ -46,7 +47,7 @@ export default class Symbols {
       let buffer = nvim.createBuffer(bufnr)
       buffer.setVar('coc_current_function', func ?? '', true)
       this.nvim.call('coc#util#do_autocmd', ['CocStatusChange'], true)
-    }, this.debounceTime())
+    }, getConditionValue(debounceTime, 0))
     events.on('CursorMoved', debounced, this, this.disposables)
     this.disposables.push(Disposable.create(() => {
       debounced.clear()
@@ -63,11 +64,6 @@ export default class Symbols {
     return config.get<boolean>('currentFunctionSymbolAutoUpdate', false)
   }
 
-  public debounceTime(): number {
-    let config = workspace.getConfiguration('coc.preferences')
-    return getConditionValue(config.get<number>('currentFunctionSymbolDebounceTime', 300), 0)
-  }
-
   public get labels(): { [key: string]: string } {
     return workspace.getConfiguration('suggest').get<any>('completionItemKindLabels', {})
   }