A command block has been set with the command "/teleport @e[type=skeleton] ~ ~-600 ~" with the settings "Repeat", "Unconditional", and "Always Active". The purpose of this command block is to effectively remove skeleton mobs by automatically teleporting them into the void. In 1.13, this worked without issue. In 1.14 Pre-Release 5, the command block only performs this function within a varying radius (usually around 150 blocks), but if outside of this radius from the command block, it will not perform its normal function. This could be an issue of the command block not working when not rendered by the game, when in past updates this has not been a problem. Furthermore, errors regarding skeletons appear in server logs.