@Sarah Sleep: I'm sorry to hear that you are experiencing this issue with your Galaxy Z Flip3. Are you using the charging cable that came packaged with the device, and an official 15W Samsung plug adapter? If you connect the phone to a home computer via USB, does the problem persist when you disconnect it?
Please ensure that your device is up to date by heading to Settings > Software update > Download and install, followed by Biometrics and security > Security update. Furthermore, please try pressing the Volume Down and Power buttons together for around 10 seconds until the phone restarts to address any software issues that might be a contributing factor. Don't worry, this won't affect your personal data or settings.
If the continues, I recommend reaching out to our Help Desk to arrange for the device to be inspected by an engineer under warranty. If you head to samsung.com > Scroll to the bottom of the page > Contact us, and get in touch via your preferred channel, then an advisor will be able to make the necessary arrangements for you.
