Powering on after sleep + shutdown

RG 35XX Plus

When setting the Sleep Function to Sleep 30 min + Shutdown, the device will not successfully power on the first time the power button is pressed after the 30 minutes. When the power button is pressed, the green power light at the top will turn on for roughly 3 seconds, and then the device seems power off again. A second attempt to power on the device is always successful.

I have had the device for two weeks. I’m new to the Anbernic devices and this OS, so it very well could be user error. Any help is appreciated. Thanks!