diff --git a/PlaytimeHistory.cs b/PlaytimeHistory.cs
index e6de1e7..74528a2 100644
--- a/PlaytimeHistory.cs
+++ b/PlaytimeHistory.cs
@@ -21,7 +21,7 @@ namespace PlaytimeHistory;
 public class PlaytimeHistory : BasePlugin, IPluginConfig<PlaytimeHistoryConfig>
 {
     public override string ModuleName => "PlaytimeHistory";
-    public override string ModuleVersion => "0.1.2";
+    public override string ModuleVersion => "0.1.3";
     public override string ModuleAuthor => "astra";
     public override string ModuleDescription => "Records playtime per session, team and alive/dead state";
 
@@ -50,7 +50,10 @@ public class PlaytimeHistory : BasePlugin, IPluginConfig<PlaytimeHistoryConfig>
     {
         public required ulong SteamId;
         public required string SessionKey;
-        public required MatchStats? Baseline;
+        // The map's running stats as last read, and this session's total so far (null until they've
+        // been read once). Read every second, so a close that can't read them still has them.
+        public MatchStats? LastStats;
+        public MatchStats? Stats;
         public string? SegmentKey;
         public DateTime SegmentStart;
         public int Team;
@@ -220,7 +223,10 @@ public class PlaytimeHistory : BasePlugin, IPluginConfig<PlaytimeHistoryConfig>
             if (tracked == null)
                 OpenSession(slot, player!, now);
             else
+            {
                 UpdateState(tracked, player!, now);
+                SampleStats(tracked, player!);
+            }
         }
         foreach (var slot in _tracked.Keys.Where(s => !seen.Contains(s)).ToList())
             CloseSession(slot, _tracked[slot], EndKind.Disconnect, now, null, null);
@@ -247,7 +253,8 @@ public class PlaytimeHistory : BasePlugin, IPluginConfig<PlaytimeHistoryConfig>
     private void OpenSession(int slot, CCSPlayerController player, DateTime now)
     {
         var location = LookupLocation(player.IpAddress);
-        var tracked = new Tracked { SteamId = player.SteamID, SessionKey = NewKey(), Baseline = ReadStats(player) };
+        var tracked = new Tracked { SteamId = player.SteamID, SessionKey = NewKey() };
+        SampleStats(tracked, player);
         _tracked[slot] = tracked;
         _writer!.Enqueue(new SessionOpen(tracked.SessionKey, tracked.SteamId, Config.ServerId, player.PlayerName, now, _map,
             _tracked.Count, Server.MaxPlayers, location?.CountryIso, location?.CountryName, location?.City, ModuleVersion));
@@ -284,7 +291,9 @@ public class PlaytimeHistory : BasePlugin, IPluginConfig<PlaytimeHistoryConfig>
         if (tracked.SegmentKey != null)
             _writer!.Enqueue(new SegmentClose(tracked.SegmentKey, now, Config.CountSpectatorTime));
 
-        var stats = player != null ? Delta(ReadStats(player), tracked.Baseline) : null;
+        if (player != null)
+            SampleStats(tracked, player);
+        var stats = tracked.Stats;
         var ping = tracked.PingSamples > 0
             ? new PingStats((int)(tracked.PingSum / tracked.PingSamples), tracked.PingMin, tracked.PingMax, tracked.PingSamples)
             : null;
@@ -310,24 +319,41 @@ public class PlaytimeHistory : BasePlugin, IPluginConfig<PlaytimeHistoryConfig>
 
     private static MatchStats? ReadStats(CCSPlayerController player)
     {
-        var stats = player.ActionTrackingServices?.MatchStats;
-        if (stats == null)
+        try
+        {
+            var stats = player.ActionTrackingServices?.MatchStats;
+            if (stats == null)
+                return null;
+            return new MatchStats(stats.Kills, stats.Deaths, stats.Assists, stats.HeadShotKills, stats.Damage, player.MVPs, player.Score);
+        }
+        catch (Exception)
+        {
             return null;
-        return new MatchStats(stats.Kills, stats.Deaths, stats.Assists, stats.HeadShotKills, stats.Damage, player.MVPs, player.Score);
+        }
     }
 
-    // This session's share of the map's running totals. Totals that went down were reset, so they
-    // count from zero.
-    private static MatchStats? Delta(MatchStats? now, MatchStats? baseline)
+    // Adds what the map's running stats gained since the last read to the session's total. The first
+    // read is only the starting point: what's there already happened before this session. Kills and
+    // score can go down (a teamkill), but deaths and damage only go down when the game resets the
+    // stats (the match starting after warmup, say); then all of the new values count.
+    private static void SampleStats(Tracked tracked, CCSPlayerController player)
     {
+        var now = ReadStats(player);
         if (now == null)
-            return null;
-        if (baseline == null)
-            return now;
-        static int D(int n, int b) => n >= b ? n - b : n;
-        return new MatchStats(D(now.Kills, baseline.Kills), D(now.Deaths, baseline.Deaths), D(now.Assists, baseline.Assists),
-            D(now.Headshots, baseline.Headshots), D(now.Damage, baseline.Damage), D(now.Mvp, baseline.Mvp),
-            D(now.Score, baseline.Score));
+            return;
+        var last = tracked.LastStats;
+        tracked.LastStats = now;
+        if (last == null)
+        {
+            tracked.Stats ??= new MatchStats(0, 0, 0, 0, 0, 0, 0);
+            return;
+        }
+        if (now.Deaths < last.Deaths || now.Damage < last.Damage)
+            last = new MatchStats(0, 0, 0, 0, 0, 0, 0);
+        var s = tracked.Stats!;
+        tracked.Stats = new MatchStats(s.Kills + now.Kills - last.Kills, s.Deaths + now.Deaths - last.Deaths,
+            s.Assists + now.Assists - last.Assists, s.Headshots + now.Headshots - last.Headshots,
+            s.Damage + now.Damage - last.Damage, s.Mvp + now.Mvp - last.Mvp, s.Score + now.Score - last.Score);
     }
 
     private Geo.Location? LookupLocation(string? address)