diff --git a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs
index ec9efa64..dd601592 100644
--- a/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs
+++ b/Libraries/SPTarkov.Server.Core/Models/Eft/Common/Tables/BotBase.cs
@@ -425,6 +425,7 @@ public record MasterySkill
 
 public record CommonSkill
 {
+    [JsonConverter(typeof(SafeDoubleConverter))]
     public double PointsEarnedDuringSession { get; set; }
 
     public long LastAccess { get; set; }
diff --git a/Libraries/SPTarkov.Server.Core/Utils/Collections/ProbabilityObjectArray.cs b/Libraries/SPTarkov.Server.Core/Utils/Collections/ProbabilityObjectArray.cs
index 670de92c..3ef05bfe 100644
--- a/Libraries/SPTarkov.Server.Core/Utils/Collections/ProbabilityObjectArray.cs
+++ b/Libraries/SPTarkov.Server.Core/Utils/Collections/ProbabilityObjectArray.cs
@@ -159,7 +159,13 @@ public class ProbabilityObjectArray<K, V> : List<ProbabilityObject<K, V>>
         for (var i = 0; i < itemCountToDraw; i++)
         {
             var rand = Random.Shared.NextDouble();
-            var randomIndex = cumulativeProbabilities.FindIndex(probability => probability > rand);
+            var randomIndex = cumulativeProbabilities.FindIndex(probability => probability >= rand);
+
+            if (randomIndex == -1)
+            {
+                continue;
+            }
+
             results.Add(this[randomIndex].Key);
         }
 
diff --git a/Libraries/SPTarkov.Server.Core/Utils/FileUtil.cs b/Libraries/SPTarkov.Server.Core/Utils/FileUtil.cs
index b3f3e4ab..8a961dbb 100644
--- a/Libraries/SPTarkov.Server.Core/Utils/FileUtil.cs
+++ b/Libraries/SPTarkov.Server.Core/Utils/FileUtil.cs
@@ -1,3 +1,4 @@
+using System.Text;
 using SPTarkov.DI.Annotations;
 
 namespace SPTarkov.Server.Core.Utils;
@@ -101,27 +102,52 @@ public class FileUtil
 
     public async Task WriteFileAsync(string filePath, string fileContent)
     {
-        if (!DirectoryExists(Path.GetDirectoryName(filePath)))
-        {
-            CreateDirectory(Path.GetDirectoryName(filePath));
-        }
-
-        if (!FileExists(filePath))
-        {
-            CreateFile(filePath);
-        }
-
-        await File.WriteAllTextAsync(filePath, fileContent);
+        var bytes = Encoding.UTF8.GetBytes(fileContent);
+        await WriteFileAsync(filePath, bytes);
     }
 
+    /// <summary>
+    /// Writes a file atomically by first writing to a temporary file, then replacing the original.
+    /// This prevents corruption if the write operation fails or is interrupted.
+    /// </summary>
     public async Task WriteFileAsync(string filePath, byte[] fileContent)
     {
-        if (!FileExists(filePath))
+        var directoryPath = Path.GetDirectoryName(filePath);
+
+        if (!string.IsNullOrEmpty(directoryPath) && !Directory.Exists(directoryPath))
         {
-            CreateFile(filePath);
+            Directory.CreateDirectory(directoryPath);
         }
 
-        await File.WriteAllBytesAsync(filePath, fileContent);
+        var tempFilePath = filePath + ".bak";
+
+        try
+        {
+            await using (
+                var fs = new FileStream(tempFilePath, FileMode.Create, FileAccess.Write, FileShare.None, bufferSize: 4096, useAsync: true)
+            )
+            {
+                await fs.WriteAsync(fileContent);
+
+                // We flush here so we can be sure it's immediately committed to disk
+                await fs.FlushAsync();
+            }
+
+            // Overwrite over the old file
+            File.Move(tempFilePath, filePath, overwrite: true);
+        }
+        catch
+        {
+            if (File.Exists(tempFilePath))
+            {
+                try
+                {
+                    File.Delete(tempFilePath);
+                }
+                catch { }
+            }
+            throw;
+        }
     }
 
     private void CreateFile(string filePath)
diff --git a/Libraries/SPTarkov.Server.Core/Utils/Json/Converters/SafeDoubleConverter.cs b/Libraries/SPTarkov.Server.Core/Utils/Json/Converters/SafeDoubleConverter.cs
new file mode 100644
index 00000000..5a5ca511
--- /dev/null
+++ b/Libraries/SPTarkov.Server.Core/Utils/Json/Converters/SafeDoubleConverter.cs
@@ -0,0 +1,49 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace SPTarkov.Server.Core.Utils.Json.Converters;
+
+public class SafeDoubleConverter : JsonConverter<double>
+{
+    public override double Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        switch (reader.TokenType)
+        {
+            case JsonTokenType.Number:
+                try
+                {
+                    return reader.GetDouble();
+                }
+                catch (FormatException)
+                {
+                    try
+                    {
+                        var decimalValue = reader.GetDecimal();
+                        return decimalValue > 0 ? double.MaxValue : 0;
+                    }
+                    catch
+                    {
+                        return double.MaxValue;
+                    }
+                }
+
+            case JsonTokenType.String:
+                if (double.TryParse(reader.GetString(), out var stringParsed))
+                {
+                    return stringParsed;
+                }
+                return 0;
+
+            case JsonTokenType.Null:
+                return 0;
+
+            default:
+                return 0;
+        }
+    }
+
+    public override void Write(Utf8JsonWriter writer, double value, JsonSerializerOptions options)
+    {
+        writer.WriteNumberValue(value);
+    }
+}