This hotfix includes two things:
Redo of vault changes
In the latest update, the vault was changed from infinitely spawning items to having a set quantity. We got a multitude of people from our steam community and our discord server saying that it was a bad change, so we have listened to all of you and reverted that change! I don't believe this should have any impact on your vault's save data, it should only affect the spawning/saving of items.
Gun sound changes
The G28 and M4A1 rifles now both have a new charging handle grab/release noise. This noise is much more realistic as it was recorded from a very similar gun in real life!