Lv_button display strange stripes

i’m using lvgl with this lcd RK043FN02H-CT. Everythings works fine but while lvgl renders a button i got this unexpected behaviour

Hello ,
I have seen this effect too , but i don´t remember exactly what it was. I think in my case there was a problem how the window of the display is written.
Have you tried the simplest and slows variant to set every single pixel instead of using the block write method ?
Best regards ,

Thanks for your reply, I solve by changing fsl_lcdidf databus size from 16 to 24 bit as described in the datasheet.

Ok, fine !