[reyBMW]

I got my battery replaced about a year ago, no issues started occurring until maybe 3 months ago when my car wouldn't start due to a dead battery. I then took it to the dealership and they told me something seems to wake up the car throughout its sleep cycle. I decided to leave the dealership since they charged an insane amount to simply find out what it was. Today I found out and saw how the start/stop button would stay on for about 10 sec after shutting and locking my car then would turn off and proceed to turn on and off and would not stop. I checked after 20min and it continued. Does anyone know a fix to this and what it may be? Taking all opinions.

[Takummie]

First of all, I'm not an expert. But here are my assumptions.
Bad ignition button
Bad comfort access components sending random signals
Bad lock button on your key fob
Bad CAS module tempting with terminal 30
CAS module software corruption doing the same thing