Today I bought 10 modules on my Jutland that I had researched earlier. Each one gave the pop-up that it was purchased and equiped. I tried to claim my Monarch and I received an error, 'Something went wrong.' I relogged and all of the modules were researched, but no longer purchased and all my credits are still gone.
Edit - Logged back in and 3 of the 10 modules are purchased, hope the others show up eventually