I've been using a Microsoft bluetooth mouse with my MacBook Pro (Early 2015 El Capitan 10.11.5) without issue for several months. OSX Bluetooth Firmware Version: v119 c4633.
However, since pairing the Bowers & Wilkins P5 Wireless headphones via bluetooth the mouse has started to automatically disconnect. Both devices work simultaneously for a short period (~5 min) until the mouse drops connection. The mouse is then shown to be disconnected in the bluetooth system settings.
The headphones do not drop connection nor lose audio. Once the headphones are manually disconnected the mouse connection is restored.
How can I use both devices simultaneously?