diff --git a/changelog.md b/changelog.md
index 9206c98..9213a1b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -18,6 +18,8 @@ to allow board code to sequence registration by implementing the weak function `
 
 Drivers:
 
+* ESP32: fixed bug blocking direction output for the second PWM spindle. Removed pin definition interfering with the third serial port for the Pibot Ultra v5.88 controller.
+
 * iMRXT1062, RP2040 and STM32F4xx: I/O expander code updated for core change.
 
 Plugins:
diff --git a/grbl.h b/grbl.h
index 15284da..1ed618c 100644
--- a/grbl.h
+++ b/grbl.h
@@ -42,7 +42,7 @@
 #else
 #define GRBL_VERSION "1.1f"
 #endif
-#define GRBL_BUILD 20260719
+#define GRBL_BUILD 20260726
 
 #define GRBL_URL "https://github.com/grblHAL"
 
diff --git a/stepper.c b/stepper.c
index 21e8cf9..c43a92a 100644
--- a/stepper.c
+++ b/stepper.c
@@ -573,7 +573,7 @@ ISR_CODE void ISR_FUNC(stepper_driver_interrupt_handler)(void)
             st_go_idle();
 
             // Ensure pwm is set properly upon completion of rate-controlled motion.
-            if(st.exec_block->dynamic_rpm && st.exec_block->spindle->cap.laser) {
+            if(st.exec_block && st.exec_block->dynamic_rpm && st.exec_block->spindle->cap.laser) {
                 prep.current_spindle_rpm = 0.0f;
                 st.exec_block->spindle->update_pwm(st.exec_block->spindle, st.exec_block->spindle->pwm_off_value);
             }