diff --git a/service2.js b/service2.js
index 02f651b..87762b7 100644
--- a/service2.js
+++ b/service2.js
@@ -26,6 +26,7 @@ class BesService {
     this.hostElement = hostElement
     this.results = [] // Results of grammar-checking, one per each block/paragraph of text
     this.createCorrectionPanel()
+    this.firstCall = true
 
     // Disable browser built-in spell-checker to prevent collision with our grammar markup.
     this.originalSpellcheck = this.hostElement.spellcheck
@@ -774,7 +775,16 @@ class BesDOMService extends BesTreeService {
    */
   onInput() {
     // Now that the text is done changing, we can correctly calculate markup position.
-    this.repositionAllMarkup()
+    // This is a way to resolve lagginess in repositioning markup with many mistakes.
+    if (this.firstCall) {
+      this.repositionAllMarkup()
+      this.firstCall = false
+    }
+    clearTimeout(this.debounceTimer)
+    this.debounceTimer = setTimeout(() => {
+      this.repositionAllMarkup()
+      this.firstCall = true
+    }, 300)
 
     // Defer grammar-checking to reduce stress on grammar-checking server.
     this.timer = setTimeout(() => {