Robot Production Plant Vault Symbol

I am still having issues obtaining this symbol even with all the latest title updates (6 is the latest I have). When i go to the symbol on the wall it says press x to discover, but when i press the button nothing happens. Is this still a known issue, I was under the impression it was fixed a while back, however this is the only behavior I have ever seen. I have only been playing this game for about a week now and I had all the TU installed before I even began playing. Thank you for any help you can provide.