diff --git a/packages/i18n/strings/uk.json b/packages/i18n/strings/uk.json
index ffe6e497f..c8bf56162 100644
--- a/packages/i18n/strings/uk.json
+++ b/packages/i18n/strings/uk.json
@@ -13,7 +13,7 @@
       "hp": "{value}од",
       "x": "x{value}",
       "percentage": "{value}%",
-      "deg_s": "{value}град/c",
+      "deg_s": "{value}°/c",
       "plus": "+{value}"
     },
     "gun_types": {
@@ -37,8 +37,8 @@
       "d_1": "Вчора"
     },
     "branches": {
-      "beta": "Beta",
-      "development": "Development",
+      "beta": "Бета",
+      "development": "Розробка",
       "opentest": "Відкритий тест",
       "preview": "Preview",
       "production": "Production"
@@ -340,8 +340,8 @@
       },
       "mixer": {
         "name": "Mixer",
-        "button": "Mix and match",
-        "description": "Mix tank modules",
+        "button": "Змішувати та поєднувати",
+        "description": "Змішані танкові модулі",
         "seo_description": "Mix and match hulls, turrets, and guns of tanks in World of Tanks Blitz",
         "screenshot": "Знімок екрану",
         "randomize": "Рандомізувати"
@@ -501,11 +501,11 @@
         "tech_tree": {
           "title": "Звичайний",
           "battle": "1 бій",
-          "battles": "{count} battles",
+          "battles": "{count} битви",
           "route": "Route {index} of {count}"
         },
         "game_modes": {
-          "title": "Game mode abilities"
+          "title": "Здібності ігрового режиму"
         },
         "review": {
           "title": "Review videos",
@@ -626,7 +626,7 @@
             "camouflageShootingStill": "Нерухомо",
             "camouflageShootingMoving": "У русі",
             "camouflageCaughtOnFire": "Caught on fire",
-            "width": "Width",
+            "width": "Ширина",
             "height": "Height",
             "length": "Length",
             "volume": "Volume",
@@ -740,7 +740,7 @@
         }
       },
       "gallery": {
-        "name": "Gallery",
+        "name": "Галерея",
         "button": "Browse all",
         "description": "Blitz player avatars",
         "seo_description": "Усі World of Tanks Blitz аватари гравців",
@@ -843,7 +843,7 @@
           "breakdown": {
             "name": "Breakdown",
             "options": {
-              "width": "Width",
+              "width": "Ширина",
               "height": "Height",
               "showTotal": "Show total",
               "listGap": "List gap",
diff --git a/packages/website/src/pages/[...chunk_default]/[...locale]/session/_index.tsx b/packages/website/src/pages/[...chunk_default]/[...locale]/session/_index.tsx
index 64062df39..2014f6149 100644
--- a/packages/website/src/pages/[...chunk_default]/[...locale]/session/_index.tsx
+++ b/packages/website/src/pages/[...chunk_default]/[...locale]/session/_index.tsx
@@ -90,15 +90,21 @@ function Content() {
       session.tracking && tankStatsB
         ? deltaTankStats(session.player.stats, tankStatsB)
             .sort((a, b) => b.last_battle_time - a.last_battle_time)
-            .map((entry) => {
+            .flatMap((entry) => {
+              if (!(entry.tank_id in tankDefinitions.tanks)) return [];
+
               const tank = tankDefinitions.tanks[entry.tank_id];
+
+              if (!(tank.id in averageDefinitions.averages)) return [];
+
               const average = averageDefinitions.averages[tank.id];
+
               const composite = compositeStats(
                 { ...entry.all, battle_life_time: entry.battle_life_time },
-                average?.mu!,
+                average.mu!,
               );
 
-              return { tank, composite };
+              return [{ tank, composite }];
             })
         : undefined,
     [session.tracking && session.player, tankStatsB],