Display backlight PWM in light sleep flashing

[bobricius]

CircuitPython version

Adafruit CircuitPython 8.0.0-beta.6 on 2022-12-21; Raspberry Pi Pico with rp2040

Code/REPL

some parts of code
.....
display = ST7789(display_bus, rotation=270, width=320, height=240, backlight_pin=board.GP20, backlight_pwm_frequency=500)
.....
display.brightness = 0.001
time_alarm = alarm.time.TimeAlarm(monotonic_time=time.monotonic() + timeInLightSleep)
pin_alarm = alarm.pin.PinAlarm(LORA_INT, value=True, pull=True)
alarm.light_sleep_until_alarms(time_alarm, pin_alarm)

Behavior

display in sleep mode start randomly flashing
also after sleep stop work Beep function, just produce crack

Is possible to add more wakeup events for PinAlarm for RP2040? by my test I can enter only one pin

def beep():
audioPin = PWMOut(AUDIO_GPIO, duty_cycle=0, frequency=440, variable_frequency=True)
audioPin.frequency = 4000
audioPin.duty_cycle = 10000 * (volume)
time.sleep(0.01)
audioPin.duty_cycle = 0
audioPin.deinit()

Description

I think some settings after wake up are not restored

Additional information

I can take video