diff --git a/web/js/common/autocomplete.js b/web/js/common/autocomplete.js
index 096b58c..a8f232e 100644
--- a/web/js/common/autocomplete.js
+++ b/web/js/common/autocomplete.js
@@ -291,7 +291,7 @@ class TextAreaCaretHelper {
 
 			this.el.value =
 				this.el.value.substring(0, startPos + offset) + value + this.el.value.substring(endPos, this.el.value.length);
-			this.el.selectionEnd = this.el.selectionStart = startPos + value.length + offset + finalOffset;
+			this.el.selectionEnd = this.el.selectionStart = startPos + value.length + offset + (finalOffset ?? 0);
 		} else {
 			this.el.value += value;
 		}