Fixed items sometimes disappearing after using the workbench.
Fixed rotating attachments not displaying properly in the workbench attachment list.
Fixed rotated items not being added to inventories properly and causing a crash.
Fixed eating without carrying a weapon causing a crash.
Fixed a quick swap from workbench weapon bug that could cause an item to disappear.
Patch 0.5.0.1 Bug fixes.
Source: Steam Community (opens in a new tab)