The headphones sometimes turn off unexpectedly (WH-1000XM5).

In the default setting, the headphones use built-in sensors to detect when you wear or remove them and automatically turn the headphones on or off as needed. If you have trouble with the headphones turning off unintentionally, check the following:

• When you wear the headphones over a cap, a scarf, or hair, etc., the sensors may not be able to detect that you are wearing them and may turn them off. To avoid this, be sure to set the earpads directly over the ears.
• If the wearing detection still bothers you, disable the Automatic Power Off setting. You can do this using the Sony | Headphones Connect app: System → Automatic Power Off, and select Do not turn off.
• If the issue is not still resolved, reset the headphones. If the issue still persists, then initialize the headphones.
  Note: Resetting the headphones will not delete the paring information, while initialization returns the headphones to the factory settings and all Bluetooth pairing information is deleted.