The bug
Placing (entity.armor_stand.place), hitting (entity.armor_stand.hit) and breaking (entity.armor_stand.break) and armor stand shows the generic subtitles "Block placed", ... subtitles instead of specific ones.
How to reproduce
/playsound minecraft:entity.armor_stand.place master @s
/playsound minecraft:entity.armor_stand.hit master @s
/playsound minecraft:entity.armor_stand.break master @s❌ The subtitles say "Block ..."
Addition: this is inconsistent with other block-like entities like an item frame which has specific subtitle for each sound