In some cases, in order to fix an HM-5 that may be acting unusual, it may help to reset the HM-5 back to factory settings.
1.) Start from the HM-5 Monitor List.
2.) Select the "hamburger icon" on the top left of the screen.
3.) Select Device Management
This screen appears. Tap the phone to the HM-5 electronic module.
4.) Select Reset to Factory
5.) Tap the electronic module.
6.) The HM-5 is now reset to Factory Settings.