LVGL 8.2, ubuntu simulator project, LV_COLOR_DEPTH is 16bit. There are stripes when displaying images with color gradients

General discussion
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LVGL 8.2, ubuntu simulator project, LV_COLOR_DEPTH is 16bit. There are stripes when displaying images with color gradients.
Left picture: The effect presented in LVGL
Right picture: The effect of opening Window11 directly
image

Original picture here:
on_1