We have one of our fleet cars ( it's an "active" trim model though, not a ST model, just FYI ) with less than 5000 miles on it that also does this with no rhyme or reason after it's been parked ( takes a varying amount of time for the "symptoms" to start showing up - this is with no persons or animals walking/creeping/flying near it, no keyfobs left in it, or any other variables, etc ). I personally think it's haunted or was built on a Friday LOL
It's been to the dealer multiple times with no resolution for this issue and has received computer updates from the dealer mobile tech as well; no DTCs or error codes present/stored or indicating anything - this was a VERY early '25 model year build car FWIW.
OP - if you ever find out the cause of your issue, please do share what your car's fix winds up being...thx !