I found this thread after recently starting to experience the random shut off issue with my Charge 5. Just wanted to share my update:
TL;DR: try changing the clock face on your fitbit. I did so at the start of the week, and issue hasn't reproduced since. only been 4 days, still monitoring (and hoping)
With low expectations, I contacted Fitbit support via the app and reported my issue. I summarized issue (it turns off randomly, have to reconnect to charging cable to have it turn back on, sometimes have to reset device after that in order for it to resync and correct the time), mentioned that fitbit community forums indicate that many others are experiencing same. The support rep asked for some info about my device, serial number, etc.
Most importantly/interestingly, he suggested that I change the clock face on my fitbit. I asked if there was a specific clock face to use or avoid, or is changing the clock face all that matters. He said that changing the clock face is all that matters.
It's only been ~3-4 days, but the issue hasn't reproduced after changing the clock face. Still need more time to monitor, but wanted to share in case it helps others.
One thing to call out: I see in the comments above that many people haven't contacted support for this (seeing no point in doing so). I encourage everyone with this problem to contact support to call out this issue. Doing it via the app is quick/painless. I work for a (different) tech company. ticket counts are one of the most impactful ways of bringing attention to product issues. Community managers may be monitoring these threads for overall sentiment/themes, but it's often best effort, at best. Nothing beats ticket counts.
