Possible fix for #3589 & partial fix for #3605

wled00/json.cpp

@@ -214,7 +214,14 @@ bool deserializeSegment(JsonObject elem, byte it, byte presetId)
   #endif
 
   byte fx = seg.mode;
-  if (getVal(elem["fx"], &fx, 0, strip.getModeCount())) { //load effect ('r' random, '~' inc/dec, 0-255 exact value)
+  byte last = strip.getModeCount();
+  // partial fix for #3605
+  if (!elem["fx"].isNull() && elem["fx"].is<const char*>()) {
+    const char *tmp = elem["fx"].as<const char *>();
+    if (strlen(tmp) > 3 && (strchr(tmp,'r') || strchr(tmp,'~') != strrchr(tmp,'~'))) last = 0; // we have "X~Y(r|[w]~[-])" form
+  }
+  // end fix
+  if (getVal(elem["fx"], &fx, 0, last)) { //load effect ('r' random, '~' inc/dec, 0-255 exact value, 5~10r pick random between 5 & 10)
     if (!presetId && currentPlaylist>=0) unloadPlaylist();
     if (fx != seg.mode) seg.setMode(fx, elem[F("fxdef")]);
   }

wled00/udp.cpp

@@ -195,6 +195,8 @@ void exitRealtime() {
   realtimeIP[0] = 0;
   if (useMainSegmentOnly) { // unfreeze live segment again
     strip.getMainSegment().freeze = false;
+  } else {
+    strip.show(); // possible fix for #3589
   }
   updateInterfaces(CALL_MODE_WS_SEND);
 }