Issue using lightsleep on CoreS3 (lite)

[ngolf]

I'm encountering an error when trying to get to light sleep on a CoreS3 Lite:

(debug message from my program): Sleep delay reached, entering light sleep
E (61558) sleep: Incorrect wakeup source (4) to disable.

The code does:

In setup():
(...)
M5.Power.begin()
..

In loop():

(...)
    if (hasBattery && (idleTime > SLEEP_DELAY_MS)) {
        Serial.println("Sleep delay reached, entering light sleep");
        M5.Power.lightSleep(0); // wake only on power button
        lastInteractionTime = millis();  // reset after wake
    }

No other M5.Power calls, other than getBatteryLevel() and isCharging.

I'm using v0.4.6 of the library, and the firmware of the cores3 is on the latest version too.

[ngolf]

I've managed to get the sleep to work (by using a value different than 0ms), but the device does not seem to wake up with either a short, or long press of the power button, or touch of the screen.

I seem to have to do 2 long ish presses (one that presumably powers off, then one that powers on (seems to do a full boot, not resuming code where it stopped)