diff --git a/HISTORY.md b/HISTORY.md
index 637ec29..97dc485 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -5,6 +5,7 @@ https://github.com/josdejong/jsoneditor
 
 ## not yet published, version 9.0.5
 
+- Fix #1090: autocomplete firing on dragging or clicking a node.
 - Fix #1096: editor crashing when passing an empty string as `name`.
 - Updated dependencies to `ajv@6.12.4`.
 
diff --git a/src/js/treemode.js b/src/js/treemode.js
index b8c748a..41f2ce9 100644
--- a/src/js/treemode.js
+++ b/src/js/treemode.js
@@ -1490,6 +1490,11 @@ treemode._showAutoComplete = function (element) {
   if (element.className.indexOf('jsoneditor-value') >= 0) jsonElementType = 'value'
   if (element.className.indexOf('jsoneditor-field') >= 0) jsonElementType = 'field'
 
+  if (jsonElementType === '') {
+    // Unknown element field. Could be a button or something else
+    return
+  }
+
   const self = this
 
   setTimeout(() => {