STM32F1 ADC Dual regular simultaneous mode only, wrong position of ADC2 samples with DMA

Hello,

I'm facing issues withering the "Dual regular simultaneous mode" on STM32F103C8T.

Basically a timer shall trigger both ADC to convert (for each ADC) 5 channels.

What I've observed is that samples from ADC1 are ok, but samples from ADC2 have wrong position into the buffer. Can you please help me understanding if my configuration si correct or not?

#define MAX_ADC_CHANNELS 10
 
#define ADC1_RESULT(DATA) \
 ((DATA) & 0x0000FFFF)
 
#define ADC2_RESULT(DATA) \
 ((DATA) >> 16)
 
uint32_t ADCfromDMA[MAX_ADC_CHANNELS/2] = {0x00000000};
 
void ADCInit(uint8_t id, char* task_name)
{
 HAL_ADCEx_Calibration_Start(&hadc1);
 HAL_ADCEx_Calibration_Start(&hadc2);
 
 HAL_TIM_Base_Start(&htim3);
 
 HAL_ADC_Start(&hadc2);
 
 HAL_ADCEx_MultiModeStart_DMA(&hadc1, (uint32_t *)ADCfromDMA, MAX_ADC_CHANNELS/2);
 
}
 
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *AdcHandle)
{
 /*Read adc values upper & lower from DMA*/
 ADCRawData[0] = ADC1_RESULT(ADCfromDMA[0]); //ok
 ADCRawData[1] = ADC2_RESULT(ADCfromDMA[0]); //ok
 
 ADCRawData[2] = ADC1_RESULT(ADCfromDMA[1]); //ok
 ADCRawData[3] = ADC2_RESULT(ADCfromDMA[1]); //ok
 
 ADCRawData[4] = ADC1_RESULT(ADCfromDMA[2]); //
 ADCRawData[5] = ADC2_RESULT(ADCfromDMA[2]); //
 ADCRawData[6] = ADC1_RESULT(ADCfromDMA[3]); //
 ADCRawData[7] = ADC2_RESULT(ADCfromDMA[3]); //
 ADCRawData[8] = ADC1_RESULT(ADCfromDMA[4]); //
 ADCRawData[9] = ADC2_RESULT(ADCfromDMA[4]); //
 
}