Bug: Selling an item to a merchant after opening a companion's inventory will cause the sold item to appear in that companion's inventory.

Workaround: Save after transferring items from a companion to your inventory. Then load your save and do not open companion inventory before selling. Similar bugs may occur when trading with multiple companions in the same session, so look out for that.

Technically, you can use this to sell the same items repeatedly, but I wouldn't recommend it. It caused even more bugs for me when I tried.

Bug: Giving an equipped item to a companion can cause another equipped item to disappear from your inventory.

Workaround: Always unequip items before removing them from your inventory.

Bug: Sometimes items will appear in a follower or merchant's inventory that can't be interacted with or moved, and may overlap with other items in the grid.

Workaround: Saving and loading seems to clear this up.

Bug: Most obvious when hacking. You try to hack a computer, but it doesn't show the result of the hack because the skill roll isn't being made.

Workaround: The game thinks one of your companions should make the roll, but can't figure out how. Move more than one screen away and leave your companions there using the companion manager window. Then go back alone and attempt the roll again. With no companions around, the skill roll will be given to you, and should be made normally.

Also good practice to save before making a skill roll that uses an item (like a drone kit), unless you know the roll will work properly.

Bug: On loading a save, weapons that use ammunition will be unloaded, even if they were loaded when you saved. Only seems to happen if that weapon is not currently equipped.

Workaround: Don't forget to reload any weapon you intend to use.

Bug: Some companions will not show what items they're carrying. Even if you give them new items, their inventory will remain empty. So far, I've only noticed it with a named companion. At the very least, recruited vagrants and guards don't seem to have this problem.

Workaround: It seems they can still use items you give them, but you'll obviously never get them back, so just be careful what you give them.

Bug: Haven't tested this myself, but apparently drones made using ranged weapons are bugged.

Workaround: Just avoid them, only make drones using melee weapons or armor, which I believe work properly.

Bug: Haven't quite figured this one out yet, but often times you'll have multiple stacks of the same ammo type appearing in your inventory. These will disappear when reloading, and don't actually reflect how much ammo you have.

Workaround: It's difficult to keep track of ammo, but the safest bet I can think of is just to assume that the smallest stack of ammo in your inventory represents your total ammo of that type. For example, if I have one stack of 12 slugs and another of 98, I actually only have 12. The 98 will disappear when I reload. [Taking this into account, ammo seems consistent between sessions so far.]

Note that you can still sell the nonexistent ammo, if you know which stack is the 'real' one.

Bug: Armor may disappear from your inventory when it breaks, then reappear later on with its durability listed at 0 or lower. Also, the armor value listed at the bottom of the inventory window may not change to reflect your broken armor. My suspicion is that the value it shows is not what the game is using, but it's difficult to be sure.

Workaround: Just equip new armor, or unequip the broken armor if you can, and the AC readout should be corrected to the new value.

I have not tested this personally. Based on yarow12's comments.

Bug: You can resurrect dead people to follow you using a lightning rod, but they don't deal or receive damage like they are supposed to. Except some of them. Some of the time. Sounds like a mess.

Check this thread for more explanation, and other advice.

Workaround: Avoid the mechanic if you don't want to unbalance your game. Or experiment with meatshield zombies if you like.

Bug: In no XP mode, training chips may not appear where they should if your character has the Elitist trait. Elitist randomly causes rare items to not spawn, and apparently training chips are considered rare items. This could make it quite difficult to level.

Workaround: Recommend not using the Elitist trait if playing in no XP mode.

Quote from Lirka:

"Don’t enter the hackers apartment. Because the elevators back out don’t work and you’ll be stuck inside, ending your game unless you saved beforehand."