Get Single Gift vs Get Gift List Letter Code Missing

Noticing that the Single Get Gift API endpoint return the letter property inside the acknowledgements property while the Get Gift List API endpoint does not, even though both API endpoint documented that letter will be returned.

Single Get Gift:

{
"id": "1767956",
"acknowledgements": [{
"letter": "00-No Letter",
"status": "NEEDSACKNOWLEDGEMENT"
}],
"amount": {
"value": 10000.0000
},

Get Gift List

{
"id": "1767956",
"acknowledgements": [{
"status": "NotAcknowledged"
}],
"amount": {
"value": 10000.0000
},

Opened a Support ticket 019756330 in case anyone (@Erik Leaver)can help follow up on this bug (documentation bug or API bug, I hope it is API bug so we can actually get the letter code from gift list).