Thanks.
Probably a bug. When the game is loaded, the auto sales list is restored by searching for item types. This will fail for items that have _name different than _type.
To begin with, I don't know why items have a _type and a _name. 99% of the time the two have the same value. Perhaps if a modder wanted multiple items to have the same name, but then, they could simply paste the same string into the localizations, or, use yaml references. These duplicate values only make the game load slower and consume more RAM hehe.