cl_deathscoreboard can push death centreprints off screen
Players complain they can't tell who fragged them.
The scoreboard has a lot of features these days: item stats, accuracy stats, flag cap records, and with the spectators list and the time until respawn there often isn't enough vertical screen space for the cause of death centreprint to fit.
By default cl_deathscoreboard is 1 and when the scoreboard appears at death, the hud_panel_notify is hidden even if it would otherwise be visible at the side of the screen, so the death event is not seen there either. Other events like flag pickups may also be interesting to dead players.
Pressing TAB while the deathscoreboard is showing does not hide it.
Players can disable cl_deathscoreboard but that also disables the countdown until respawn, and the instruction to press jump to respawn.