Charge 5 screen goes blank when running

[Baxi]

My charge 5 is repeatedly going blank in tge middle of a run.

It won't restart until plugged into the charger where it then shows it still has 80% charge so I'm at a loss as to why this is happening. 

Really frustrating when you're wanting to log mileage.

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @Baxi. It's nice to see you around the Fitbit Community Forums. Thanks for bringing this to my attention and for the troubleshooting steps you've tried. I'm sorry to hear that your Charge 5 keeps turning off during your runs. I understand how frustrating this can be, I will do my best to help you with this!

If you haven't done so yet, please try the steps below:

1. From the Today tab in the Fitbit app, tap the devices icon at the top-left corner.
2. Tap your Fitbit device image. 
3. Near the bottom of the page, tap Sync Now.

If the above doesn't work, please restart your Fitbit device once again as suggested here How do I restart my Fitbit device? Note: Restarting the device doesn’t delete any data. If the restart doesn't work try to change your clock face. If this fixes the issue, you can change your clock face back to the original clock face.