2027 Land Cruiser Dead Twice in First Month

I am extremely disappointed with my brand-new 2027 Toyota Land Cruiser 250. My Land Cruiser is less than one month old, and the battery has already gone completely dead twice.
The first time, the vehicle had been driven approximately 300 km and then sat for only a few days before becoming completely unresponsive. There were no lights, no power, and no ability to unlock or start the vehicle. When I brought the vehicle in for inspection, I was told that no issue could be found. I was informed that the battery may have been discharged during shipping from Japan, and the battery was manually recharged and returned to me.
However, the exact same problem happened again. After driving the vehicle normally, the battery once again went completely dead after only a short period of parking.
A brand-new flagship SUV should not be experiencing total battery failure after just a few days of sitting. This has now happened twice in less than one month of ownership, which makes me seriously question whether there is an underlying issue with the vehicle, such as the 12V battery, charging system, or an abnormal parasitic power drain.
To make matters even more concerning, a few days before the second battery failure, the Toyota app unexpectedly sent me a notification at around 2–3 a.m. stating that the moonroof had been unlocked. I immediately went outside to check the vehicle, but everything was closed and there were no signs of tampering. The notification only disappeared after I manually unlocked and locked the vehicle again. I have no idea whether this is related, but it has made me wonder if there could be an issue with the vehicle’s electronics or connected services.
I purchased a Toyota because of its reputation for reliability. So far, my experience has been the opposite. A vehicle that becomes completely dead twice within its first month of ownership is simply unacceptable, especially for a flagship SUV costing nearly $100,000 CAD.
Has anyone else experienced this issue with the new Land Cruiser 250, or have any idea what could be causing it?