Hello @ImHei
After a more detailed analysis I realized that the problem also occurs with the Verdin development board.
I didn’t see it before because I had enabled the DSI to HDMI overlay verdin-imx8mp_dsi-to-hdmi_overlay.dtbo ( although it was not needed).
Can you enable this overlay and see if this solves your issue? Although this isn’t an elegant solution, it can be a temporary workaround while we figure out the root cause of this behavior.
Best regards,
Josep