Honda CRF1100AL 2019 Owner's Manual page 327

Symptom
Sounds skip
Noises mix
Presence of another Bluetooth® device or a device that emits
electromagnetic waves such as communication equipment in the
vicinity sometimes affects the communication.
Due to the characteristics of Bluetooth®, though in rare cases,
the system operation may become unstable. When it remains
unstable, turn off the power to the audio system or the device
being used, and then turn it on again.
The storage location of the Bluetooth® device sometimes affects
the audio system and communication. When sounds skip or
noises mix, change the location of the device. For example, when
the device is kept in a pocket of clothing sandwiched in between
the rider and passenger, the communication may be affected.
Also, weather, buildings in the vicinity, road conditions, etc. can
sometimes affect the communication.
Audio System Trouble
Cause/remedy
Continued 323