The bug

/scoreboard objectives add <objective> <criteria> <displayName> or /scoreboard objectives modify <objective> displayname <displayName> does not resolve <displayName>.

Steps to reproduce

1. summon minecraft:armor_stand ~ ~ ~ {UUIDMost: 0L, UUIDLeast: 0L, CustomName: '"MC-164039"'}
   

2. scoreboard objectives add _ dummy {"nbt": "CustomName", "entity": "0-0-0-0-0", "interpret": true}
   

   Created new objective [] (expected: Created new objective [MC-164039])

3. scoreboard objectives modify _ displayname ""
   

4. scoreboard objectives modify _ displayname {"nbt": "CustomName", "entity": "0-0-0-0-0", "interpret": true}
   

   Changed objective _ display name to [] (expected: Changed objective _ display name to [MC-164039])