Combining arrows with 350

When I play Diablo 2 Resurrection, in the inventory box of the village in Act 1, if there are 290 arrow items and 270 arrow items, and if I click one arrow item and then the other arrow item, There is a problem that the arrow items on the side where the item is placed are not sorted into 350 items.

Also, when an arrow item in the bag inventory is placed on an arrow item in the town’s inventory box, the arrow item on the side where the item is placed is not sorted into 350.

Currently, if I stack 2 arrow items in my inventory, it’s working correctly that the arrow items on the drop side will be sorted to 350.