diff --git a/.github/ISSUE_TEMPLATE/bug1.yml b/.github/ISSUE_TEMPLATE/bug1.yml
index 6a1f6993..68cd2bae 100644
--- a/.github/ISSUE_TEMPLATE/bug1.yml
+++ b/.github/ISSUE_TEMPLATE/bug1.yml
@@ -1,6 +1,6 @@
 name: "Minecraft 崩溃"
 description: "PCL 提示 “Minecraft 出现错误”，或游戏崩溃"
-labels: [· Bug, 新反馈]
+labels: [· Bug, 新提交]
 body:
 - type: checkboxes
   id: "yml-1"
diff --git a/.github/ISSUE_TEMPLATE/bug2.yml b/.github/ISSUE_TEMPLATE/bug2.yml
index b2db13b4..de636f07 100644
--- a/.github/ISSUE_TEMPLATE/bug2.yml
+++ b/.github/ISSUE_TEMPLATE/bug2.yml
@@ -1,6 +1,6 @@
 name: "下载或登录时卡住或失败"
 description: "下载游戏、Mod 或整合包，或登录正版账号时出现问题"
-labels: [· Bug, 新反馈]
+labels: [· Bug, 新提交]
 body:
 - type: checkboxes
   id: "yml-1"
diff --git a/.github/ISSUE_TEMPLATE/bug9.yml b/.github/ISSUE_TEMPLATE/bug9.yml
index 124b0c7a..be20097d 100644
--- a/.github/ISSUE_TEMPLATE/bug9.yml
+++ b/.github/ISSUE_TEMPLATE/bug9.yml
@@ -1,6 +1,6 @@
 name: "综合 Bug 反馈"
 description: "遇见了没有细分选项的其他 Bug"
-labels: [· Bug, 新反馈]
+labels: [· Bug, 新提交]
 body:
 - type: checkboxes
   id: "yml-1"
diff --git a/.github/ISSUE_TEMPLATE/ch.yml b/.github/ISSUE_TEMPLATE/ch.yml
index 77ed3fda..0ddd6930 100644
--- a/.github/ISSUE_TEMPLATE/ch.yml
+++ b/.github/ISSUE_TEMPLATE/ch.yml
@@ -1,6 +1,6 @@
 name: "优化建议"
 description: "对已有功能的小幅度优化或改进建议"
-labels: [· 优化, 新反馈]
+labels: [· 优化, 新提交]
 body:
 - type: checkboxes
   id: "yml-1"
diff --git a/.github/ISSUE_TEMPLATE/feature.yml b/.github/ISSUE_TEMPLATE/feature.yml
index e799ee42..e27452b5 100644
--- a/.github/ISSUE_TEMPLATE/feature.yml
+++ b/.github/ISSUE_TEMPLATE/feature.yml
@@ -1,6 +1,6 @@
 name: "新功能提案"
 description: "对已有功能的大幅度修改，或添加一个新内容或选项"
-labels: [· 新功能, 新反馈]
+labels: [· 新功能, 新提交]
 body:
 - type: checkboxes
   id: "yml-1"
diff --git a/Plain Craft Launcher 2/Modules/Base/ModBase.vb b/Plain Craft Launcher 2/Modules/Base/ModBase.vb
index 5f65c581..ca5aab48 100644
--- a/Plain Craft Launcher 2/Modules/Base/ModBase.vb	
+++ b/Plain Craft Launcher 2/Modules/Base/ModBase.vb	
@@ -1721,6 +1721,16 @@ RetryDir:
     Public Function RegexReplaceEach(Input As String, Replacement As MatchEvaluator, Regex As String, Optional options As RegexOptions = RegularExpressions.RegexOptions.None) As String
         Return RegularExpressions.Regex.Replace(Input, Regex, Replacement, options)
     End Function
+    ''' <summary>
+    ''' 检查传入字符串会不会引发 Issue #4505
+    ''' </summary>
+    Public Function Ntfs83NameCheck(name As String) As Boolean
+        Dim regex As New Regex("(.*)~(\d*)")
+        Dim namePart As Byte() = Encoding.UTF8.GetBytes(regex.Match(name).Groups(1).Value)
+        Dim numPart As Integer = regex.Match(name).Groups(2).Value.Length
+
+        Return namePart.Length >= 6 AndAlso numPart = 1
+    End Function
 
 #End Region
 
diff --git a/Plain Craft Launcher 2/Modules/Base/ModValidate.vb b/Plain Craft Launcher 2/Modules/Base/ModValidate.vb
index b7f818b4..0321004b 100644
--- a/Plain Craft Launcher 2/Modules/Base/ModValidate.vb	
+++ b/Plain Craft Launcher 2/Modules/Base/ModValidate.vb	
@@ -233,6 +233,8 @@ Public Class ValidateFolderName
             '检查特殊字符串
             Dim InvalidStrCheck As String = New ValidateExceptSame({"CON", "PRN", "AUX", "CLOCK$", "NUL", "COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"}, "文件夹名不可为 %！", True).Validate(Str)
             If Not InvalidStrCheck = "" Then Return InvalidStrCheck
+            '检查 NTFS 8.3 (issue #4505)
+            If Ntfs83NameCheck(Str) Then Return "文件夹名不能是一个有效的 NTFS 8.3 文件名！"
             '检查文件夹重名
             Dim Arr As New List(Of String)
             If PathIgnore IsNot Nothing Then
@@ -286,6 +288,8 @@ Public Class ValidateFileName
             '检查特殊字符串
             Dim InvalidStrCheck As String = New ValidateExceptSame({"CON", "PRN", "AUX", "CLOCK$", "NUL", "COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"}, "文件名不可为 %！", True).Validate(Str)
             If Not InvalidStrCheck = "" Then Return InvalidStrCheck
+            '检查 NTFS 8.3 (issue #4505)
+            If Ntfs83NameCheck(Str) Then Return "文件名不能是一个有效的 NTFS 8.3 文件名！"
             '检查文件重名
             If ParentFolder IsNot Nothing Then
                 Dim DirInfo As New DirectoryInfo(ParentFolder)
@@ -351,7 +355,9 @@ Fin:
             '检查特殊字符串
             Dim InvalidStrCheck As String = New ValidateExceptSame({"CON", "PRN", "AUX", "CLOCK$", "NUL", "COM0", "COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9", "LPT0", "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"}, "文件夹名不可为 %！").Validate(SubStr)
             If Not InvalidStrCheck = "" Then Return InvalidStrCheck
+            '检查 NTFS 8.3 (issue #4505)
+            If Ntfs83NameCheck(Str) Then Return "文件夹名不能是一个有效的 NTFS 8.3 文件名！"
         Next
         Return ""
     End Function
-End Class
+End Class
\ No newline at end of file