In Grbl.h Grbl.cpp renamed init() to grbl_init(). It was getting double called.

Grbl_Esp32/Grbl_Esp32.ino

@@ -21,7 +21,7 @@
 #include "src/Grbl.h"
 
 void setup() {
-    init();
+    grbl_init();
 }
 
 void loop() {

Grbl_Esp32/src/Grbl.cpp

@@ -21,7 +21,7 @@
 #include "Grbl.h"
 #include <WiFi.h>
 
-void init() {
+void grbl_init() {
 #ifdef USE_I2S_OUT
     i2s_out_init();  // The I2S out must be initialized before it can access the expanded GPIO port
 #endif

Grbl_Esp32/src/Grbl.h

@@ -23,7 +23,7 @@
 // Grbl versioning system
 
 #define GRBL_VERSION "1.3a"
-#define GRBL_VERSION_BUILD "20200812"
+#define GRBL_VERSION_BUILD "20200813"
 
 //#include <sdkconfig.h>
 #include <Arduino.h>
@@ -95,7 +95,7 @@
 #    include "I2SOut.h"
 #endif
 
-void init();
+void grbl_init();
 void run_once();
 
 // Called if USE_MACHINE_INIT is defined