Hmmm
I looked at some of the other Amex Gift-Card (GC) threads to see what was happening there - and it looks like Amex is tightening down on GC purchases.
Alaskan, Delta and Hawaiian GC look to be having issues.
American and United GC look like they are still are working.
I have included the last update from these threads below.
In the past people have reported that you may be able to change your airline designation if you have not applied any charges to it.
You then will need to talk to a CR or get a CHAT - and see if they will work with you to change it.
I am going to wait to see if more people are having success getting GC credits on AA and UA.
If they are - I am going to attempt to move my designated airline to them (I have no charges on my AS credit).
Then buy one $50 GC - and see what happens.
** Recent Amex GC Threads
Delta GC Thread - June 2
No credit yet. Not looking good guys... should I contact chat rep?
Hawaiian GC Thread - June 1
Purchased a $50 GC on 05/17/17 and it codes as Hawiann Gifts. Haven't been credited back the $50 yet. Where did I mess up? By not buying it in $100 increment?
American GC Thread - June 6
Purchased $100 AA 5/31, got reimbursement on 6/2
United GC Thread - May 31
I charged $200 to the UA gift registry w/ amex plat. It posted 5/28 and I got the credit 5/30.