I'm running PulseAudio (default on Ubuntu 20.04).
It's also (still) present on Linux unfortunately :/ Realoding with F3+T works as a workaround... but that's not something I'd like to do. Is there a corresponding ticket for Linux?
Valid hack but not a solution to the problem.
Confirmed, can reproduce on 1.16.2-pre1. (It may be a copy of MC-92875, but sometimes even bigger items such as arrows flying at relatively lower velocities don't get registerd). The easiest method to replicate is to create a 1-long floating tripwire contraption and throw snowballs/eggs/pearls straight down(or slightly angled). It's relatively easy to trigger this bug, when throwing from >2 blocks above. Try to move a little up or down. Here is my setup to reproduce (Aiming at the farther edge):
[media][media]affects 1.16.2-pre1
! Seems to be resolved in 20w18a.
and 20w18a
still happens in 1.15.2.
dock setup is "auto hide dock" set to ON and "panel mode" set to OFF (it displays a floating-dock). Remember, that you also need a native gnome "screenshot" keybind bound to "PrintScreen" (I'm not sure what do you mean by "don't have setup for dock"?).