I'm not sure where to start since I can't figure out what plugins might be causing the issue, or if it's a bug with Rust or Oxide. Whenever a play buys something from Bandit it'll randomly give them a single quantity of metal frag, stone, and other items rather than the item they purchase. One buddy mentioned he bought an LR300 at bandit and it just gave him a metal frag. Someone else reported they got a stone once, then nothing, when buying something else.

I'm running the latest server build as of today Feb 6th 2021
Oxide is v2.0.4903

Plugins are:

01 "Admin Radar" (5.1.0) by nivex (10.37s) - AdminRadar.cs
02 "AutoBroadcast" (1.0.8) by Wulf/lukespragg (0.09s) - AutoBroadcast.cs
03 "Automated Events" (1.0.7) by k1lly0u/mspeedie/Arainrr (1.22s) - AutomatedEvents.cs
04 "Better Chat" (5.2.5) by LaserHydra (1.45s) - BetterChat.cs
05 "Better Chat Mute" (1.2.1) by LaserHydra (0.05s) - BetterChatMute.cs
06 "BetterLoot" (3.0.1) by Default (8.13s) - BetterLoot.cs
07 "Copy Paste" (4.1.27) by misticos (0.34s) - CopyPaste.cs
08 "Crafting Controller" (3.1.6) by Whispers88 (0.21s) - CraftingController.cs
09 "Death Notes" (6.3.5) by LaserHydra (1.90s) - DeathNotes.cs
10 "Enhanced Hammer" (2.0.6) by Iv Misticos (81.33s) - EnhancedHammer.cs
11 "FriendlyFire" (1.7.0) by playrust.io / dcode (1.65s) - FriendlyFire.cs
12 "Furnace Splitter" (2.3.1) by FastBurst (7.82s) - FurnaceSplitter.cs
13 "Gathering Manager" (2.2.75) by Mughisi (0.64s) - GatherManager.cs
14 "GPay" (2.0.2) by Soccerjunki (0.02s) - GPay.cs
15 "Image Library" (2.0.56) by Absolut & K1lly0u (0.04s) - ImageLibrary.cs
16 "InfoPanel" (1.0.1) by Default (11.75s) - InfoPanel.cs
17 "Kits" (3.2.95) by Reneb (1.36s) - Kits.cs
18 "Loading Messages" (1.0.6) by CosaNostra/Def (0.04s) - LoadingMessages.cs
19 "NoDecay" (1.0.62) by RFC1920 (18.70s) - NoDecay.cs
20 "NTeleportation" (1.4.7) by nivex (1.45s) - NTeleportation.cs
21 "PlayerAdministration" (1.6.2) by Pho3niX90 (0.01s) - PlayerAdministration.cs
22 "PrivateMessages" (1.1.11) by MisterPixie (0.05s) - PrivateMessages.cs
23 "Quick Smelt" (5.1.3) by Iv Misticos (0.62s) - QuickSmelt.cs
24 "Raidable Bases" (1.6.6) by nivex (57.42s) - RaidableBases.cs
25 "SAMSiteAuth" (2.3.3) by haggbart (0.03s) - SAMSiteAuth.cs
26 "Save Announcer" (1.0.4) by Ryan (0.03s) - SaveAnnouncer.cs
27 "SaveMyMap" (1.3.6) by FuJiCuRa (46.79s) - SaveMyMap.cs
28 "Sign Artist" (1.2.6) by Whispers88 (0.01s) - SignArtist.cs
29 "Spawn Mini" (2.10.0) by SpooksAU (1.25s) - SpawnMini.cs
30 "Spectate" (0.4.3) by Wulf/lukespragg (0.04s) - Spectate.cs
31 "Stack Size Controller" (2.0.4) by Canopy Sheep (4.13s) - StackSizeController.cs
32 "Start Protection" (2.3.2) by wazzzup (2.81s) - StartProtection.cs
33 "TimeOfDay" (2.3.4) by FuJiCuRa (0.00s) - TimeOfDay.cs
34 "Trade" (1.2.43) by Calytic (0.17s) - Trade.cs
35 "Vanish" (1.3.8) by Whispers88 (6.50s) - Vanish.cs
36 "Welcomer" (1.5.1) by Tricky (0.19s) - Welcomer.cs

I'd post under the specific plugin that's causing the problem, but I'm not sure which plugin is causing it or if it's even a plugin issue.

I noticed selling metal frags to Bandit yesterday was acting weird. I'd sell, then it make a 'ding' without actually selling anything. Now people are reporting this new bug today. I haven't updated any plugins since before this Thursday's forced wipe and the current Oxide builds. Only Rust and Oxide have been updated.

I got same problem but i don't know where this prob come i'm in same position but that issue have start when the drone system at come and i not use exactly the same plugin like you !

theshadow

I'd post under the specific plugin that's causing the problem, but I'm not sure which plugin is causing it or if it's even a plugin issue.

I noticed selling metal frags to Bandit yesterday was acting weird. I'd sell, then it make a 'ding' without actually selling anything. Now people are reporting this new bug today. I haven't updated any plugins since before this Thursday's forced wipe and the current Oxide builds. Only Rust and Oxide have been updated.

Could you give me the list of plugins and versions you run? type in "plugins" to console and paste in the text here

Still having this issue for me. I feel like the problem came around when they introduced the drone delivery system. It's not just Outpost vending machines either. Player built vending machines have had the same issue too, along with the Bandit NPC vendors.

Anyone have any more insight on this? Still happening on my server. 

Anyone remember the old "TC eats HQM" bug?  Somehow the list of repair materials in a repair bench was getting crossed with the list of materials for tool cupboard upkeep. 

Maybe something like that is messing with your vending machine transactions.

@ilakskil, I think it started a month or two before the drones for me. Perhaps something was changed in the Rust code a month prior to the drones and Softcore settings going live.

@dexgaming, My players haven't reported the bug in awhile so I assume it's either rare or currently resolved on my server somehow. 

@Zugzwang, I'm wondering if this is the underlying cause, but I don't know enough about how plugins utilize different available hooks and how hooks get updated within the game. Or if hooks is even the correct term.

I've been having the same issue on my server as well I have a "raid vending maching for raid supply's and people trade bleach for C4 and now randomly get they're getting stone or metal frags instead.. I also feel this just started with in the past 2 major updatesand I've changed nothing on my server.. I hope we can find a fix for this.