'previous' and 'next' media buttons are bind to 'Drop Selected item' and 'Social Interactions screen' respectively
The media buttons 'previous' and 'next' are assigned such that when pressed:
⏮ (previous): drops the selected item
and
⏭ (next): opens the Social Interactions screen/menu
Here i used the default minecraft keybindings where:
'q' key = drops item, and 'p' key =Social Interactions