Hello,
The Island expedition vendors that sell the Salvage boxes for 75 to 175 Seafarer’s Dubloons are selling the WRONG boxes.
The 3 islands this reset are Jorundall, Snowblossom Village & Havenswood. Yet the boxes for sale are from Molten Clay, Skittering Hollow & Whispering Reef.
I have been farming islands for months now, and every single time I could buy the boxes from the 3 islands currently active, so I assume this has to be some kind of bug. I am trying to collect the mounts from these crates, and this is going to get alot harder in Shadowlands (alot less players queing) and I want to buy several Jorundall & Havenswood salvage crates this week. They should be for sale, but they are not 
I hope you can hotfix this and put the correct boxes on sale before the reset on Tuesday night 22/09.
Thank you.
PS - Sorry for the double post, I did it on the wrong character the first time =/