CA1508 False positive on Nullable DateTime

[langdonx]

Analyzer

Diagnostic ID: CA1508: Avoid dead conditional code

Analyzer source

NuGet Package: Microsoft.CodeAnalysis.FxCopAnalyzers

Version: v3.3.1 (Latest)

Describe the bug

It's reporting a false positive checking that DateTime? != null:

var punchIn = (DateTime?)t.GetProperty($"SchedulePunchIn{i}Time").GetValue(dbSchedule);
var punchOut = (DateTime?)t.GetProperty($"SchedulePunchOut{i}Time").GetValue(dbSchedule);

if (punchIn != null || punchOut != null) // this line here

Steps To Reproduce

Simply write the following code:

var a = (DateTime?)DateTime.UtcNow;
if (a != null) { }

Expected behavior

It shouldn't cause a warning.

Actual behavior

It causes a warning.

Additional context

N/A