QMK - RGBLIGHT underglow for ADJUST layer - qmk

Question

I have Drop Planck rev. 6 and I managed to get it working almost the way I want. I struggle with the underglow color for ADJUST layer (LWR+RSE). I followed the manual from here: github
The relevant part of my keymap.c looks like this:
const rgblight_segment_t PROGMEM my_layer1_layer[] = RGBLIGHT_LAYER_SEGMENTS(
{0, 1, HSV_ORANGE},
{1, 8, HSV_ORANGE}
);
const rgblight_segment_t PROGMEM my_layer2_layer[] = RGBLIGHT_LAYER_SEGMENTS(
{0, 1, HSV_GREEN},
{1, 9, HSV_GREEN}
);
const rgblight_segment_t PROGMEM my_layer3_layer[] = RGBLIGHT_LAYER_SEGMENTS(
{0, 1, HSV_RED},
{1, 8, HSV_RED}
);
const rgblight_segment_t PROGMEM my_layer4_layer[] = RGBLIGHT_LAYER_SEGMENTS(
{0, 1, HSV_PURPLE},
{1, 8, HSV_PURPLE}
);
const rgblight_segment_t PROGMEM my_layer5_layer[] = RGBLIGHT_LAYER_SEGMENTS(
{0, 1, HSV_CYAN},
{1, 8, HSV_CYAN}
);
const rgblight_segment_t PROGMEM my_layer6_layer[] = RGBLIGHT_LAYER_SEGMENTS(
{0, 1, HSV_BLUE},
{1, 8, HSV_BLUE}
);
const rgblight_segment_t* const PROGMEM my_rgb_layers[] = RGBLIGHT_LAYERS_LIST(
my_layer1_layer, // Overrides base layer
my_layer2_layer, // Overrides other layers
my_layer3_layer, // Overrides other layers
my_layer4_layer, // Overrides other layers
my_layer5_layer, // Overrides other layers
my_layer6_layer // Overrides other layers
);
void keyboard_post_init_user(void) {
// Enable the LED layers
rgblight_enable_noeeprom(); // Enables RGB, without saving settings
rgblight_sethsv_noeeprom(HSV_ORANGE);
rgblight_mode_noeeprom(RGBLIGHT_MODE_STATIC_LIGHT);
rgblight_layers = my_rgb_layers;
}
layer_state_t default_layer_state_set_user(layer_state_t state) {
rgblight_set_layer_state(0, layer_state_cmp(state, _BASE));
//return state;
return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
}
layer_state_t layer_state_set_user(layer_state_t state) {
rgblight_set_layer_state(1, layer_state_cmp(state, _LOWER));
rgblight_set_layer_state(2, layer_state_cmp(state, _RAISE));
rgblight_set_layer_state(3, layer_state_cmp(state, _ADJUST));
rgblight_set_layer_state(4, layer_state_cmp(state, _LAYER4));
rgblight_set_layer_state(5, layer_state_cmp(state, _LAYER5));
//return state;
return update_tri_layer_state(state, _LOWER, _RAISE, _ADJUST);
}
LOWER and RAISE layers as well as the other two are backlit as configured, but when I press both LWR and RSE to activate ADJUST layer, the color changes to RED (=RAISE), but the keys are working as expected. When I stop pressing either LWR or RSE, the color then changes to PURPLE (=ADJUST), but the keys are either from RAISE or LOWER respectively.
I am just beginning with QMK with very little knowledge from C, so I think I am missing something trivial and obvious, but cannot find what the issue is caused by.
I would be grateful for anything that would point me to the right direction.
Thanks