After performing the Android 9.0 (Pie) upgrade, the call ended tone is sounded twice on my Galaxy Buds. Why is this?

Galaxy Buds notifies call ending as beeping sound to users whenever call ended.  Also if the mobile device connected to Galaxy Buds

is running Pie OS, it forwards call end notification to Galaxy Buds. So user will listen duplicated beeping sounds when the call ends.

If this feels uncomfortable to listen to, please deactivate “Play tone when call ends” feature on call settings.

Phone > More > Settings > Call alerts and ringtones > Tap Play tone when call ends switch to deactivate it