Cyberpunk: Is Nocturne Op55N1 supposed to disappear?

I played through the game and after the last mission-block (Nocturne Op55N1) and the Credit-Screen I was sent back to Night City – but the quest still remains in my questlog – is this normal?

Also some items I found along the last mission are gone – directly after the Adam Smasher fight they are still there, but once I enter the Mikoshi and do all the stuff there, the next time i can enter my inventory my stuff is gone (except for one gun – seems kind of random) – this is a bug right?