Strange problem with STemWin Library

[Ahaji.1]

Hello everyone

I'm working on STemWin532 library on STM32F103ZET6 bord in STM32CudeIDE. I could successfully configured LCD interface (The Controller is HX8325B and GUI runs on internal RAM) and insert some text on the screen (following image):

But when i use external SRAM as GUI memory result is very strange and interesting :). The text is driven out of the screen. The following picture shows the situation:

While the code is the same code that works correctly in the internal RAM of MCU. The only command that i changed is the following variable definition for GUI memory allocation:

#include "GUI.h"
#define GUI_NUMBYTES 1024*50
 
U32 static aMemory[GUI_NUMBYTES/4]; // This is for internal RAM
U32 static aMemory[GUI_NUMBYTES/4]__attribute__((section(".GUI_0x68000000"))); // This is for extenal SRAM
 
void GUI_X_Config(void) {
 GUI_ALLOC_AssignMemory(aMemory, GUI_NUMBYTES);
}

The section .GUI_0x68000000 is defined within linker command file as follows:

// other codes ...............
 
/* Memories definition */
 
MEMORY
{
 RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 64K
 FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 512K
 ExtSRAM (xrw) : ORIGIN = 0x68000000, LENGTH = 1024K
 
}
 
/* Sections */
SECTIONS
{
 .GUI_0x68000000 :
 {
 
 } >ExtSRAM 
 
// other codes.......
 
}

Build Analyzer output of CudeIDE shows the memory usage:

There is no hard fault in execution procedure and while(1) loop is executing as normal:

Any help will highly appreciated.

Best Regards

Ali.H