Pardon my mandarin but I'm the first owner. I meant it only had 16k miles back in April. Now @ 20k. We didn't really drive much especially in the pandemic.
I might indeed give it a try after I exhausted other options. But right now based on what Tesla is saying, it seems like it's not due to app.
In even more details, Tesla told me that, over the last two weeks, the battery drain at parking was 70% preconditioning and 18% upkeep. It doesn't really explain why I turned off the preconditioning last night and it still lost 7 miles but I'll have to monitor it for a few days to weeks. And tomorrow would be the service visit so I also hope that with a new AC filter and FSD computer it may help lower the upkeep loss too...