diff --git a/radio/src/targets/common/arm/stm32/module_timer_driver.cpp b/radio/src/targets/common/arm/stm32/module_timer_driver.cpp
index 0a5bf1097..e93570461 100644
--- a/radio/src/targets/common/arm/stm32/module_timer_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/module_timer_driver.cpp
@@ -46,7 +46,10 @@ static void module_timer_send(void* ctx, const etx_timer_config_t* cfg,
                               const void* pulses, uint16_t length)
 {
   auto timer = (const stm32_pulse_timer_t*)ctx;
-  if (!stm32_pulse_if_not_running_disable(timer)) return;
+  if (!stm32_pulse_if_not_running_disable(timer)) {
+    LL_DMA_DeInit(timer->DMAx, timer->DMA_Stream);
+    return;
+  }
 
   // Set polarity
   stm32_pulse_set_polarity(timer, cfg->polarity);
diff --git a/radio/src/targets/common/arm/stm32/stm32_pulse_driver.cpp b/radio/src/targets/common/arm/stm32/stm32_pulse_driver.cpp
index 857e4aa7f..101eebbff 100644
--- a/radio/src/targets/common/arm/stm32/stm32_pulse_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/stm32_pulse_driver.cpp
@@ -298,12 +298,12 @@ void stm32_pulse_start_dma_req(const stm32_pulse_timer_t* tim,
   // Enable TC IRQ
   LL_DMA_EnableIT_TC(tim->DMAx, tim->DMA_Stream);
 
-  // Reset counter close to overflow
-  if (IS_TIM_32B_COUNTER_INSTANCE(tim->TIMx)) {
-    LL_TIM_SetCounter(tim->TIMx, 0xFFFFFFFF);
-  } else {
-    LL_TIM_SetCounter(tim->TIMx, 0xFFFF);
-  }
+  // Reset counter
+  LL_TIM_SetCounter(tim->TIMx, 0x00);
+
+  // only on PWM (preloads the first period)
+  if (ocmode == LL_TIM_OCMODE_PWM1)
+    LL_TIM_GenerateEvent_UPDATE(tim->TIMx);
 
   LL_TIM_EnableDMAReq_UPDATE(tim->TIMx);
   LL_DMA_EnableStream(tim->DMAx, tim->DMA_Stream);