"is" operator works differently in Immediate Window for boxed values

Question

For a boxed int, e.g. object boxedInt = 0 defined in your code, both is object and is int return false in Visual Studio's Immediate Window. This is a bug, isn't it?

Code:

int normalInt = 0;

Debug.WriteLine(normalInt.GetType().FullName); // System.Int32
Debug.WriteLine(normalInt is object);          // true
Debug.WriteLine(normalInt is int);             // true
Debug.WriteLine(normalInt is System.Int32);    // true

object boxedInt = 0;

Debug.WriteLine(boxedInt.GetType().FullName); // System.Int32
Debug.WriteLine(boxedInt is object);          // true
Debug.WriteLine(boxedInt is int);             // true
Debug.WriteLine(boxedInt is System.Int32);    // true

Immediate Window:

normalInt.GetType().FullName
"System.Int32"
normalInt is object
true
normalInt is int
true
normalInt is System.Int32
true

boxedInt.GetType().FullName
"System.Int32"
boxedInt is object
false                                         // WTF?
boxedInt is int
false                                         // WTF?
boxedInt is System.Int32
false                                         // WTF?

object boxedInt2 = 0;
Expression has been evaluated and has no value
boxedInt2.GetType().FullName
"System.Int32"
boxedInt2 is object
true
boxedInt2 is int
true
boxedInt2 is System.Int32
true

Microsoft Visual Studio Enterprise 2017
Version 15.3.3
VisualStudio.15.Release/15.3.3+26730.12

Microsoft .NET Framework
Version 4.7.02046

Visual C# 2017 00369-60000-00001-AA135

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Screenshot with Watch window:

Answer 1

Under Tools->Option->Debugging, please enable option "Use the legacy C# and VB expression evaluators", debug it again.

Update:

The issue has been reported here:

https://developercommunity.visualstudio.com/content/problem/31283/and-operation-of-boolean-is-wrong.html