Scrolling from inventory slot to inventory slot really quickly, such that any intervening slots do not have a chance to display their item, instantly forces the player to look down and also rotate 180 degrees if already looking down.
I am using an Evoluent sideways mouse, the only input I am providing is the mouse wheel, and I'm playing in Realms.
Scrolling one slot at a time or pressing the inventory slot buttons does not produce this effect. Inventory slots must be skipped whilst scrolling.
Discovered that this is a conflict between (presumably) the mouse wheel changes implemented in 1.13 and the mouse wheel acceleration option in the Evoluent Mouse software.
If the mouse wheel acceleration option is disabled in the Evoluent software, then the game works normally.
Frankly, mouse acceleration should not be directing my vision to the ground regardless; please fix the mouse wheel changes in 1.13.