I've owned 3 of these new macbook pros, now on the 2019 16". This has happened to both the prior ones. Luckily I always get Applecare and it usually only takes 5 biz days to send the device in get it fixed (single day), and sent back to me. It's never caused any performance or reliability issue, and I get it fixed while transitioning to a new machine, so doesn't cause in hiccups in my workflow.
I do treat my mbp as a desktop 99% of the time. It sits on my desk on a stand, plugged into two 5k displays. It never even 'sleeps', just the screens turn off after a 15 min timeout. I'm sure this is contributing to the issue, but I know this has happened to other people who treat their mbp's in a more 'laptop-like' fashion, ie. sleeping it when not in use, not 100% connected to power. It seems to be just a side-effect of these modern batteries and the technology being pushed so hard. Not great obviously, but has impacted me too much so far.