diff --git a/app/src/main/java/kr/co/vividnext/sodalive/live/room/LiveRoomViewModel.kt b/app/src/main/java/kr/co/vividnext/sodalive/live/room/LiveRoomViewModel.kt
index c888b7cd..c7d3a273 100644
--- a/app/src/main/java/kr/co/vividnext/sodalive/live/room/LiveRoomViewModel.kt
+++ b/app/src/main/java/kr/co/vividnext/sodalive/live/room/LiveRoomViewModel.kt
@@ -1,5 +1,6 @@
 package kr.co.vividnext.sodalive.live.room
 
+import android.os.Looper
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import com.google.gson.Gson
@@ -98,6 +99,9 @@ class LiveRoomViewModel(
 
     private val blockedMemberIdList: MutableList<Long> = mutableListOf()
 
+    // 메인 스레드 보장을 위한 Handler (postValue의 병합(coalescing) 이슈 방지 목적)
+    private val mainHandler = android.os.Handler(android.os.Looper.getMainLooper())
+
     fun getUserNickname(memberId: Int): String {
         for (manager in roomInfoResponse.managerList) {
             if (manager.id.toInt() == memberId) {
@@ -677,11 +681,19 @@ class LiveRoomViewModel(
     }
 
     fun addDonationCan(can: Int) {
-        _totalDonationCan.postValue(totalDonationCan.value!! + can)
+        if (Looper.myLooper() == Looper.getMainLooper()) {
+            _totalDonationCan.value = (_totalDonationCan.value ?: 0) + can
+        } else {
+            mainHandler.post { addDonationCan(can) }
+        }
     }
 
     fun addHeartDonation(heartCount: Int = 1) {
-        _totalHeartCount.postValue(totalHeartCount.value!! + heartCount)
+        if (Looper.myLooper() == Looper.getMainLooper()) {
+            _totalHeartCount.value = (_totalHeartCount.value ?: 0) + heartCount
+        } else {
+            mainHandler.post { addHeartDonation(heartCount) }
+        }
     }
 
     fun donationStatus(roomId: Long, onSuccess: (GetLiveRoomDonationStatusResponse) -> Unit) {