mr_cheese

The scoreboard case is slightly different than the linked report (although /scoreboard is mentioned there) because the name of the scoreboard is not a namespaced identifier. This means that unlike /data, /attribute, etc., it is impossible to delete the scoreboard objective once it is created, because you cannot use minecraft: to refer to the same identifier.

The sound is probably too far away to be heard. execute as <entity> doesn’t change the position that the command is executed from, so the sound will still play from the world origin even though the cushion is making the sound. Try execute as @e[type=cushion] at @s ...

brief code analysis: FloatTag.getAsLong does not call floor in the conversion, as opposed to getAsByte, getAsShort, getAsInt, and DoubleTag.getAsLong which all do. that is the cause of the inconsistent behavior