diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6066ddff5..5fdcde66e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,17 +16,6 @@ jobs:
       run: |
        make actions-test
        bash <(curl -s https://codecov.io/bash) -t $CODECOV_TOKEN
-  arm64-unit-test:
-    runs-on: self-hosted
-    steps:
-    - name: Install Go
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.15.x
-    - name: Checkout code
-      uses: actions/checkout@v2
-    - name: Test
-      run: make test
   race-unit-test:
     runs-on: ubuntu-18.04
     steps:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 413267e2a..4c3261a5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ Dragonboat v3.4 comes with many improvements. All v3.3.x users are recommended t
 
 ### New features
 
-- Raft Pre-Vote support.
+- Experimental Raft Pre-Vote support.
 
 ### Improvements
 
diff --git a/README.CHS.md b/README.CHS.md
index 693102d20..8811f5487 100644
--- a/README.CHS.md
+++ b/README.CHS.md
@@ -9,7 +9,6 @@
 
 ## 项目新闻 ##
 * 2021-01-20 Dragonboat v3.3 已发布，请查看[CHANGELOG](CHANGELOG.md)获知所有更新情况。
-* 2020-03-05 Dragonboat v3.2 已发布，请查看[CHANGELOG](CHANGELOG.md)获知详情。
 
 ## 关于 ##
 Dragonboat是一个高性能纯[Go](https://golang.org)语言实现的多组[Raft](https://raft.github.io/) [共识算法](https://en.wikipedia.org/wiki/Consensus_(computer_science))库。
diff --git a/README.md b/README.md
index 1d44a02d6..8420dd1d9 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,6 @@
 
 ## News ##
 * 2021-01-20 Dragonboat v3.3 has been released, please check [CHANGELOG](CHANGELOG.md) for all changes.
-* 2020-03-05 Dragonboat v3.2 has been released, please check [CHANGELOG](CHANGELOG.md) for details.
 
 ## About ##
 Dragonboat is a high performance multi-group [Raft](https://raft.github.io/) [consensus](https://en.wikipedia.org/wiki/Consensus_(computer_science)) library in pure [Go](https://golang.org/).
diff --git a/internal/raft/raft.go b/internal/raft/raft.go
index c60066364..e1dcc92d2 100644
--- a/internal/raft/raft.go
+++ b/internal/raft/raft.go
@@ -538,7 +538,7 @@ func (r *raft) timeForElection() bool {
 	return r.electionTick >= r.randomizedElectionTimeout
 }
 
-func (r *raft) timeForHearbeat() bool {
+func (r *raft) timeForHeartbeat() bool {
 	return r.heartbeatTick >= r.heartbeatTimeout
 }
 
@@ -629,7 +629,7 @@ func (r *raft) leaderTick() error {
 		r.abortLeaderTransfer()
 	}
 	r.heartbeatTick++
-	if r.timeForHearbeat() {
+	if r.timeForHeartbeat() {
 		r.heartbeatTick = 0
 		if err := r.Handle(pb.Message{
 			From: r.nodeID,
diff --git a/internal/transport/transport.go b/internal/transport/transport.go
index 178fad9d4..e1ba4c09f 100644
--- a/internal/transport/transport.go
+++ b/internal/transport/transport.go
@@ -401,11 +401,14 @@ func (t *Transport) send(req pb.Message) (bool, failedSend) {
 	if sq.rateLimited() {
 		return false, rateLimited
 	}
+
+	sq.increase(req)
+
 	select {
 	case sq.ch <- req:
-		sq.increase(req)
 		return true, success
 	default:
+		sq.decrease(req)
 		return false, chanIsFull
 	}
 }