Key to the Past

Key to the Past is a quest in Fallout 76.

Bugs
When leaving the world mid quest, some or all of the key pieces may be gone from inventory on relog, forcing the player to repeat the respective quest stages to acquire them again and be able to continue the quest. There is no known fix other than finish the whole quest during one session to avoid triggering the bug.
 * The bug seems to be triggered most often as a result of the game being quitted abruptly - by crashing, task killing or using the alt-f4 key shortcut. Avoiding those actions when possible and leaving the game world before quitting the game might help to prevent the bug from happening.