I was doing some crafting and I noticed a couple of bugs stemming from the newly-added Miner's Sack:
1.) The Miner's Sack does not store ore from the player's inventory despite the description stating to the contrary, and
2.) When using the Miner's Sack on a crafting station (ex: a Smelter), the items are stored in the Sack but the weight of the new items is not added to the player's total encumberance until another weight calculation is performed.
For example, let's say a player's total encumberance is 25 lbs. If 55 lbs of ingots are inside of a Smelter crafting station, and a Miner's Sack is used on the Smelter, the ingots will be placed inside of the Sack, but the player's total encumberance will remain at 25 lbs. If, however, the player picks up and item, discards and item, or places an item into a bag, the player's total encumberance will update to 80 lbs (plus or minus whatever weight is lost when picking up/discarding an item or placing it into a bag).
While these conditions persist a player who would normally be overencumbered by storing materials in the Miner's Sack will function as though they were not overencumbered, and if they would cease to be overencumbered by emptying a Miner's Sack into a crafting station will function as though they were still overencumbered.