try

ReallifeGamemode.Client/util/animationSync.ts

@@ -71,6 +71,10 @@
             return;
         }
 
+        playAnim(entity, string);
+    });
+
+    async function playAnim(entity, string) {
         while (true) {
             let index = mp.game.joaat(string);
             let animData = animationSyncData.animations[index];
@@ -83,7 +87,10 @@
             loadAnimDict(animDict, function () {
                 mp.players.exists(entity) && 0 !== entity.handle && entity.taskPlayAnim(animDict, animName, 1, 0, -1, parseInt(flag), 0, !1, !1, !1)
             });
-            mp.game.wait(duration);
+
+            while (entity.isPlayingAnim(animDict, animName, 3)) {
+                await mp.game.waitAsync(0);
+            }
 
             let pair = pairData.find(pair => pair.from == name);
             if (!pair)
@@ -92,7 +99,7 @@
             string = pair.transitionTo;
             mp.gui.chat.push("transition to " + string);
         }
-    });
+    }
 
     function loadAnimDict(animDict, callback) {
         if (mp.game.streaming.hasAnimDictLoaded(animDict)) return void callback();