diff --git a/public/script.js b/public/script.js
index 2e8b8d736..cda7adea3 100644
--- a/public/script.js
+++ b/public/script.js
@@ -5427,6 +5427,7 @@ export function cleanUpMessage(getMessage, isImpersonate, isContinue, displayInc
         getMessage = getMessage.substring(0, getMessage.indexOf('<|endoftext|>'));
     }
     const isInstruct = power_user.instruct.enabled && main_api !== 'openai';
+    const isNotEmpty = (str) => str && str.trim() !== '';
     if (isInstruct && power_user.instruct.stop_sequence) {
         if (getMessage.indexOf(power_user.instruct.stop_sequence) != -1) {
             getMessage = getMessage.substring(0, getMessage.indexOf(power_user.instruct.stop_sequence));
@@ -5434,7 +5435,7 @@ export function cleanUpMessage(getMessage, isImpersonate, isContinue, displayInc
     }
     // Hana: Only use the first sequence (should be <|model|>)
     // of the prompt before <|user|> (as KoboldAI Lite does it).
-    if (isInstruct && power_user.instruct.input_sequence) {
+    if (isInstruct && isNotEmpty(power_user.instruct.input_sequence)) {
         if (getMessage.indexOf(power_user.instruct.input_sequence) != -1) {
             getMessage = getMessage.substring(0, getMessage.indexOf(power_user.instruct.input_sequence));
         }