When stash a large amount of items (more than 999) into a chest by using the key "stash to near by chests", the quantity of this item in chest may be inaccuracy.

Please look at these pictures, the first one shows that there are 1*hay & mixed seeds in my chest, and 1000*hays & mixed seeds in my backpack. After my press on "Q"(or click the "stash" button beside the interface) to stash items into this chest, you can see in the second picture that the quantity of hays and mixed seeds become 1999(2x999+1), means that those stacks has less than 999 items would be set to 999.

Sry if my English confused you. QAQ

mod version: 1.6.6
game version: 1.6.15
operating system: windows
mod lists: Automate, ContentPatcher, ConvenientChests, DataLayers, FarmTypeManager, FishingInfoOverlays, FrontierFarm, GenericModConfigMenu, LetsMoveIt, LookupAnything, StardewValleyExpanded, StardewHack, TimeSpeed, UIInfoSuite2, VisibleFish, WearMoreRings, ZoomLevel