Partial framebuffer screen block Update problem on a custom board with SPI LCD and no TE pin

[hqMicro]

Hi Community!

I worked with TouchGFX for last few years but this is my first attempt with partial faramebuffer strategy.

The MCU is STM32G0B1CBT, TouchGFX 4.24.1 and The LCD is 240x320 with ili9341 driver

I'm simulating the TE pin in systick to make the engine working. not sure if i'm doing it right

if (frame_tick_ms > 0) {
		  frame_tick_ms--;
		  if (frame_tick_ms == 0) {
			  v_sync = v_sync ? false : true;
			  if (v_sync) {
				frame_tick_ms = 85;
				VSYNC_Rising_Callback();
			  }
			  else {
				frame_tick_ms = 5;
				VSYNC_Falling_Callback();
			  }
		  }
	  }

I tryed to follow the G071 example code. The LCD is up and working and i'm able to fill it with color before the GUI starts. But after that i'm facing this on my display and can't figure out where is the problem.

It's looks like the framework doesn't sending the whole blocks and after a few lines it's stops till next transmition.

Thanks in advance!