the following 2 packs from this month’s free list do now show up as
“owned” or in the Epic launcher / marketplace fault if bought, even tho you can order them for free and get a invoice for them:
this error happens to several people and is also reported on reddit:
https://www.reddit.com/r/unrealengine/comments/15fvl5s/cant_buy_2_items_from_the_featured_free_unreal/
Thinking you probably meant ‘this month’s free list do NOT show up as owned’. Either way same problem. The SHIP & MUSEUM packs are glitched. If you re-try clicking on buy, you get a message saying: ‘Sorry, you already own this item, or it’s still being processed’. The Ship description is also missing engine version info iirc, so maybe that’s part of it idk. BTW: Signing out / clearing browser cache / switching browser doesn’t fix this. Its good that email receipts are working tho, as that means Epic has to fix this sometime presumably. 
Hi all,
Just wanted to confirm that I’m seeing the same thing.
I claimed/“purchased” all of the assets at once. (Via the Launcher interface I think (as opposed to web interface))
Ship + Museum do appear in my library though. So I feel confident that they will continue to be there.