diff --git a/CHANGELOG.md b/CHANGELOG.md
index 37bc069d9..d8846f4b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ All notable changes to this project will be documented in this file.
 ### Fixed
 - ESP32 Webcam add boundary marker before sending mjpeg image (#12376)
 - DDS238-2 wrong reactive power value (#12283)
+- NO VALID JSON regression from may 4th (#12440)
 
 ## [Released]
 
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 9248da449..e5839a07a 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -107,6 +107,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl http://ota.tasmo
 ### Fixed
 - DDS238-2 wrong reactive power value [#12283](https://github.com/arendst/Tasmota/issues/12283)
 - ESP32 Webcam add boundary marker before sending mjpeg image [#12376](https://github.com/arendst/Tasmota/issues/12376)
+- NO VALID JSON regression from may 4th [#12440](https://github.com/arendst/Tasmota/issues/12440)
 
 ### Noted
 - ESP32 single core **tasmota32solo1.bin** binary can only be uploaded using the GUI as OTA upload will trigger the watchdog timer
\ No newline at end of file
diff --git a/tasmota/xdrv_10_rules.ino b/tasmota/xdrv_10_rules.ino
index b7e4b9238..4dc784da1 100644
--- a/tasmota/xdrv_10_rules.ino
+++ b/tasmota/xdrv_10_rules.ino
@@ -512,7 +512,13 @@ bool RulesRuleMatch(uint8_t rule_set, String &event, String &rule, bool stop_all
 
 //AddLog(LOG_LEVEL_DEBUG, PSTR("RUL-RM2: RulesRuleMatch |%s|"), buf.c_str());
 
-  buf.replace("\\"," ");                               // "Disable" any escaped control character
+// Do not do below replace as it will replace escaped quote too.
+//  buf.replace("\\"," ");                               // "Disable" any escaped control character
+  buf.replace("\n"," n");                              // "Disable" escaped control character
+  buf.replace("\t"," t");                              // "Disable" escaped control character
+  buf.replace("\r"," r");                              // "Disable" escaped control character
+  buf.replace("\f"," f");                              // "Disable" escaped control character
+  buf.replace("\b"," b");                              // "Disable" escaped control character
   JsonParser parser((char*)buf.c_str());
   JsonParserObject obj = parser.getRootObject();
   if (!obj) {
@@ -2139,8 +2145,8 @@ void CmndRule(void)
       }
 
       // we need to split the rule in chunks
-      rule = rule.substring(0, MAX_RULE_SIZE);
-      rule += F("...");
+//      rule = rule.substring(0, MAX_RULE_SIZE);
+//      rule += F("...");
     }
     Response_P(PSTR("{\"%s%d\":{\"State\":\"%s\",\"Once\":\"%s\",\"StopOnError\":\"%s\",\"Length\":%d,\"Free\":%d,\"Rules\":\"%s\"}}"),
       XdrvMailbox.command, index, GetStateText(bitRead(Settings->rule_enabled, index -1)), GetStateText(bitRead(Settings->rule_once, index -1)),