Are you using the Macbook’s native Bluetooth?
More details might be useful/helpful such as make/model, OS version?
Possible fixes:
- remove the Bluetooth .plist file (/Library/Preferences/com.apple.Bluetooth.plist) and reboot.
- factory reset connected devices (Shift-Option-Click on Bluetooth icon in tray: select “Factory reset all…”
- reset the Bluetooth module (Shift-Option-Click on Bluetooth icon in tray: select “Reset the Bluetooth…”