The Bug
Since they are predominantly composed of stone, should they not use the stone sound instead? I'm aware that this has been reported before, and that the ticket it supposedly duplicated was resolved as invalid, but all sound issues being confusingly bundled into the one ticket is not a standard we should currently hold ourselves to, and each sound issue should be given a fair trial by itself.
Steps to Reproduce
Obtain some repeaters and comparators.
Place them down, break them, and as you do this, pay close attention to the sounds they produce.
Take note as to whether or not repeaters and comparators produce wood sounds despite mostly being constructed of stone.
Observed Behavior
Repeaters and comparators produce wood sounds despite mostly being constructed of stone.
Expected Behavior
Repeaters and comparators would produce stone sounds as they're mostly constructed of this material.
Can confirm in 20w51a.