I run the save command before I restart the server (daily). I am now having players report that their backpack is entirely empty when they log in after the restart. Any ideas how to approach this? Is there a setting I missed? 

{
  "Drop on Death (true/false)": true,
  "Erase on Death (true/false)": false,
  "Clear Backpacks on Map-Wipe (true/false)": true,
  "Only Save Backpacks on Server-Save (true/false)": false,
  "Use Blacklist (true/false)": false,
  "Blacklisted Items (Item Shortnames)": [
    "autoturret",
    "lmg.m249"
  ],
  "Use Whitelist (true/false)": false,
  "Whitelisted Items (Item Shortnames)": [],
  "Minimum Despawn Time (Seconds)": 300.0,
  "GUI Button": {
    "Image": "https://i.imgur.com/CyF0QNV.png",
    "Background color (RGBA format)": "1 0.96 0.88 0.15",
    "GUI Button Position": {
      "Anchors Min": "0.5 0.0",
      "Anchors Max": "0.5 0.0",
      "Offsets Min": "185 18",
      "Offsets Max": "245 78"
    }
  },
  "Softcore": {
    "Reclaim Fraction": 0.5
  },
  "Backpack Size (1-7 Rows)": 7
}

Two possibilities come to mind. First, the 3.7 update included a change where Backpacks don't save unless their contents change. There may be a bug with that, but I suspect not. Second, the 3.7 update included a change to store the items in a coffin per player below the map. The coffin is invincible, has no colliders, and is not visible except to players who have opened it, so I don't expect it to be an issue, but if the coffin were somehow removed and then the plugin tried to save the items. then the items in that player's backpack would be lost.

To help narrow down if the 3.7 changes are causing the issue, can you try rolling back to 3.6.3 for a while?

Sure, I could give that a shot.

If it helps, it's only happening with one player on the server. I wasn't on when it happened. They'd finished a raid in the 15-ish minutes prior to wipe and when they logged back on, the player claims their backpack (with all their loot) was empty. :shrug:

As he would have lost all the his backpack contents with the wipe I am surprised he worried about it ?

 "Clear Backpacks on Map-Wipe (true/false)": true,​

I have had problems with logging off and then finding that tasks were incomplete when logging back on , such as teleport not carried out , lights on/fires lit even though turned off before logging off, not sure if its a save issue where the information from my pc is not reaching server "on time" before save is completed,
I have had no errors or missing backpack contents at all (so far) after a wipe, i have my server set to not clear backpacks after a wipe,

pookins

As he would have lost all the his backpack contents with the wipe I am surprised he worried about it ?

 "Clear Backpacks on Map-Wipe (true/false)": true,​

I have had problems with logging off and then finding that tasks were incomplete when logging back on , such as teleport not carried out , lights on/fires lit even though turned off before logging off, not sure if its a save issue where the information from my pc is not reaching server "on time" before save is completed,
I have had no errors or missing backpack contents at all (so far) after a wipe, i have my server set to not clear backpacks after a wipe,

I'm talking about daily restarts, not a wipe. 

This is the only player this has happened to in over a year of using this plugin. 

Philoludos

I'm talking about daily restarts, not a wipe. 

This is the only player this has happened to in over a year of using this plugin. 

Please read your own post !

it stated the  player lost the backpack contents 15 minutes prior to the wipe !

pookins

Please read your own post !

it stated the  player lost the backpack contents 15 minutes prior to the wipe !

The first post states "players" but in the second you define that it only happened to "one player", I was only giving an example of what it might be , i have had no problems with backpacks in the many years since its release.

I misspoke in my second post. It was just the daily wipe. 

Philoludos

I misspoke in my second post. It was just the daily wipe. 

no problems, i think you mean the "daily restart" though.   :)

pookins

no problems, i think you mean the "daily restart" though.   :)

I clearly need to get some rest.