2010 Prius Base Difficulty Starting

Hi all,

Got a strange issue with my 2010 prius. I press on brake and power on but while my dash turns on, my after market stereo and the engine do not start. I release brake and press power button to power off. Press on brake to start back up and it'll start up normally. Sometimes I might need to repeat. I did notice tonight that if I had lights on before starting, it wouldn't start up at all until I turned off lights. I did have one start up where 30 seconds after I powered it on, the stereo display lit up then I could start the engine without powering off first. This started happening about a month ago after I went on vacation for about 9 days. When it is started properly, I don't see any check engine lights. I checked the 12V battery and it was around 12.4V. My best guess now is my aftermarket stereo was sipping power causing some issue. The aftermarket stereo is one of those chinese Android Auto/CarPlay devices.