diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35a1c370f..ddef54c65 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,8 +7,12 @@ All notable changes to this project will be documented in this file.
 ### Added
 - TLS in binary tasmota-zbbridge (#9620)
 
+### Changed
+- PlatformIO library structure redesigned for compilation speed by Jason2866
+
 ### Fixed
 - Rule Break not working as expected when ONCE is enabled (#9245)
+- Rule expressions using mems corrupts character pool (#9301)
 
 ## [9.0.0.2] - 20201025
 ### Added
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 3f9f212ba..bbd0c486a 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -97,6 +97,7 @@ The attached binaries can also be downloaded from http://ota.tasmota.com/tasmota
 - Rotary driver adjusted accordingly if Mi Desk Lamp module is selected (#9399)
 - Tasmota Arduino Core v2.7.4.5 allowing webpassword over 47 characters (#9687)
 - Webserver code optimizations (#9580, #9590)
+- PlatformIO library structure redesigned for compilation speed by Jason2866
 
 ### Fixed
 - Ledlink blink when no network connected regression from v8.3.1.4 (#9292)
@@ -113,6 +114,7 @@ The attached binaries can also be downloaded from http://ota.tasmota.com/tasmota
 - Zigbee battery percentage (#9607)
 - HassAnyKey anomaly (#9601)
 - Rule Break not working as expected when ONCE is enabled (#9245)
+- Rule expressions using mems corrupts character pool (#9301)
 
 ### Removed
 - Support for direct upgrade from Tasmota versions before v7.0
diff --git a/tasmota/xdrv_10_rules.ino b/tasmota/xdrv_10_rules.ino
index 35b7525dc..accb43042 100644
--- a/tasmota/xdrv_10_rules.ino
+++ b/tasmota/xdrv_10_rules.ino
@@ -2176,7 +2176,10 @@ void CmndMemory(void)
       if (XdrvMailbox.data_len > 0) {
 #ifdef USE_EXPRESSION
         if (XdrvMailbox.data[0] == '=') {  // Spaces already been skipped in data
-          dtostrfd(evaluateExpression(XdrvMailbox.data + 1, XdrvMailbox.data_len - 1), Settings.flag2.calc_resolution, SettingsText(SET_MEM1 + XdrvMailbox.index -1));
+          char rules_mem[FLOATSZ];
+          dtostrfd(evaluateExpression(XdrvMailbox.data + 1, XdrvMailbox.data_len - 1), Settings.flag2.calc_resolution, rules_mem);
+          SettingsUpdateText(SET_MEM1 + XdrvMailbox.index -1, rules_mem);
+
         } else {
           SettingsUpdateText(SET_MEM1 + XdrvMailbox.index -1, ('"' == XdrvMailbox.data[0]) ? "" : XdrvMailbox.data);
         }