backlight issue on BOARD_ESP32_S3_TOUCH_LCD_4_3

[BigPoit]

hi, i'm using BOARD_ESP32_S3_TOUCH_LCD_4_3 with lvgl 9.4
everything works fine, except the backlight on() and off() also triggers the com-poort on / off.
looks like all 8 bits are set to HIGH / LOW simultaniously instead of only number 2 (EXIO2).
masking does not seems to work as expected.

IO_EXPANDER driver is CH422G and for the backlight I use SWITCH_EXPANDER
both set in esp_panel_drivers_conf.h

Maybe a newer version of CH422G would help?

Regards, Peter