Describe the bug
When I use EEZ-studio to create a project and implant it to my lvgl project,its all good. However, when I disabled LV_USE_PERF_MONITOR and LV_USE_MEM_MONITOR together,the screen failed to display anything I created.

To Reproduce

1. EEZ studio,create a project with 'LVGL with eez flow'
   2.implant the ui files in lvgl project
   3.compile and run,all fine.
   4.modify the relevant content in lv_conf.h as below:
   /1: Show CPU usage and FPS count/
   #define LV_USE_PERF_MONITOR 0
   #if LV_USE_PERF_MONITOR
   #define LV_USE_PERF_MONITOR_POS LV_ALIGN_BOTTOM_RIGHT
   #endif

    /*1: Show the used memory and the memory fragmentation
     * Requires LV_MEM_CUSTOM = 0*/
    #define LV_USE_MEM_MONITOR 0
    #if LV_USE_MEM_MONITOR
        #define LV_USE_MEM_MONITOR_POS LV_ALIGN_BOTTOM_LEFT
    #endif
   

5.compile and run,seeing nothing on screen.
*p.s. if at least one of them enabled,no display problem.The problem I encountered only happens when I disabled them together.

Screenshots
If applicable, add screenshots to help explain your problem.
LV_USE_PERF_MONITOR and LV_USE_MEM_MONITOR not disabled:

LV_USE_PERF_MONITOR and LV_USE_MEM_MONITOR disabled:

Desktop (please complete the following information):

• OS: ubuntu
• Version: 16.04

** LVGL version (if used)**

• 8.2