diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2fbe900f..91619a89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 ### WLED version 0.11.0
 
+#### Build 2011290
+
+-   Release of WLED 0.11.0 "Mirai"
+-   Workaround for weird empty %f Espalexa issue
+-   Fixed crash on saving preset with HTTP API `PS`
+-   Improved performance for color changes in non-main segment
+
 #### Build 2011270
 
 -   Added tooltips for speed and intensity sliders (PR #1378)
diff --git a/wled00/json.cpp b/wled00/json.cpp
index d8d8f57e..7c3ce05f 100644
--- a/wled00/json.cpp
+++ b/wled00/json.cpp
@@ -68,6 +68,7 @@ void deserializeSegment(JsonObject elem, byte it)
           if (i == 1) {colSec[0] = rgbw[0]; colSec[1] = rgbw[1]; colSec[2] = rgbw[2]; colSec[3] = rgbw[3];}
         } else { //normal case, apply directly to segment (=> no transition!)
           seg.colors[i] = ((rgbw[3] << 24) | ((rgbw[0]&0xFF) << 16) | ((rgbw[1]&0xFF) << 8) | ((rgbw[2]&0xFF)));
+          if (seg.mode == FX_MODE_STATIC) strip.trigger(); //instant refresh
         }
       }
     }
diff --git a/wled00/presets.cpp b/wled00/presets.cpp
index e5e2015f..7fd2e5d2 100644
--- a/wled00/presets.cpp
+++ b/wled00/presets.cpp
@@ -37,33 +37,37 @@ bool applyPreset(byte index)
 void savePreset(byte index, bool persist, const char* pname, JsonObject saveobj)
 {
   if (index == 0 || index > 250) return;
-  bool docAlloc = fileDoc;
+  bool docAlloc = (fileDoc != nullptr);
   JsonObject sObj = saveobj;
 
   if (!docAlloc) {
     DEBUGFS_PRINTLN(F("Allocating saving buffer"));
-    fileDoc = new DynamicJsonDocument(JSON_BUFFER_SIZE);
-    sObj = fileDoc->to<JsonObject>();
+    DynamicJsonDocument lDoc(JSON_BUFFER_SIZE);
+    sObj = lDoc.to<JsonObject>();
     if (pname) sObj["n"] = pname;
-  } else {
+    DEBUGFS_PRINTLN(F("Save current state"));
+    serializeState(sObj, true);
+    currentPreset = index;
+
+    writeObjectToFileUsingId("/presets.json", index, &lDoc);
+  } else { //from JSON API
     DEBUGFS_PRINTLN(F("Reuse recv buffer"));
     sObj.remove(F("psave"));
     sObj.remove(F("v"));
-  }
 
-  if (!sObj["o"]) {
-    DEBUGFS_PRINTLN(F("Save current state"));
-    serializeState(sObj, true, sObj["ib"], sObj["sb"]);
-    currentPreset = index;
-  }
-  sObj.remove("o");
-  sObj.remove("ib");
-  sObj.remove("sb");
-  sObj.remove(F("error"));
-  sObj.remove(F("time"));
+    if (!sObj["o"]) {
+      DEBUGFS_PRINTLN(F("Save current state"));
+      serializeState(sObj, true, sObj["ib"], sObj["sb"]);
+      currentPreset = index;
+    }
+    sObj.remove("o");
+    sObj.remove("ib");
+    sObj.remove("sb");
+    sObj.remove(F("error"));
+    sObj.remove(F("time"));
 
-  writeObjectToFileUsingId("/presets.json", index, fileDoc);
-  if (!docAlloc) delete fileDoc;
+    writeObjectToFileUsingId("/presets.json", index, fileDoc);
+  }
   presetsModifiedTime = now(); //unix time
   updateFSInfo();
 }
diff --git a/wled00/src/dependencies/espalexa/Espalexa.h b/wled00/src/dependencies/espalexa/Espalexa.h
index cf42f9ff..b0962c49 100644
--- a/wled00/src/dependencies/espalexa/Espalexa.h
+++ b/wled00/src/dependencies/espalexa/Espalexa.h
@@ -144,8 +144,11 @@ private:
     char buf_col[80] = "";
     //color support
     if (static_cast<uint8_t>(dev->getType()) > 2)
-      sprintf_P(buf_col,PSTR(",\"hue\":%u,\"sat\":%u,\"effect\":\"none\",\"xy\":[%f,%f]")
-        ,dev->getHue(), dev->getSat(), dev->getX(), dev->getY());
+      //TODO: %f is not working for some reason on ESP8266 in v0.11.0 (was fine in 0.10.2). Need to investigate
+      //sprintf_P(buf_col,PSTR(",\"hue\":%u,\"sat\":%u,\"effect\":\"none\",\"xy\":[%f,%f]")
+      //  ,dev->getHue(), dev->getSat(), dev->getX(), dev->getY());
+      sprintf_P(buf_col,PSTR(",\"hue\":%u,\"sat\":%u,\"effect\":\"none\",\"xy\":[%s,%s]"),dev->getHue(), dev->getSat(),
+        ((String)dev->getX()).c_str(), ((String)dev->getY()).c_str());
       
     char buf_ct[16] = "";
     //white spectrum support
diff --git a/wled00/wled.h b/wled00/wled.h
index 6a9048a5..f56bc1e8 100644
--- a/wled00/wled.h
+++ b/wled00/wled.h
@@ -8,7 +8,7 @@
  */
 
 // version code in format yymmddb (b = daily build)
-#define VERSION 2011270
+#define VERSION 2011290
 
 //uncomment this if you have a "my_config.h" file you'd like to use
 //#define WLED_USE_MY_CONFIG