Btn btn focus error

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Description

When I focus on a button in a list, the focus is not correct on that button.

What MCU/Processor/Board and compiler are you using?

STM32F407

What do you experience?

Give a detailed description. “It doesn’t work” is not enough information for us to diagnose the issue.

What do you expect?

Code to reproduce

Add a code snippet to reproduce the issue in the simulator. It should contain only the relevant code which can be compiled. Bug reports without code snippets or with erroneous code snippets will not be reviewed.

Use the ```c and ``` tags to format your code:

/*You code here*/
	list_Language_config= lv_list_create(Config_screen, NULL);

// lv_obj_set_size(list_Language_config, 239, 320);
lv_obj_set_pos(list_Language_config,30, 3 5+lv_obj_get_height(list_btn[0])*Num_btn_config);
lv_obj_add_style(list_Language_config, LV_OBJ_PART_MAIN, &text_style_nomal);

	/*Add buttons to the list*/

	list_language_btn[0] = lv_list_add_btn(list_Language_config, NULL,"Tiếng Việt");
	lv_obj_add_style(list_language_btn[0], LV_OBJ_PART_MAIN, &text_style_nomal);
	lv_obj_set_event_cb(list_language_btn[0], Config_event_handler);

	list_language_btn[1] = lv_list_add_btn(list_Language_config, NULL,"English");
	lv_obj_add_style(list_language_btn[1], LV_OBJ_PART_MAIN, &text_style_nomal);
	lv_obj_set_event_cb(list_language_btn[1], Config_event_handler);

	lv_obj_set_height(list_Language_config,lv_obj_get_height(list_language_btn[0])*2);

	lv_list_focus_btn(list_Language_config,list_language_btn[0]);
	lv_obj_set_hidden(list_Language_config, true);

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