If the cursor hovers over an open or closed drawer, as long as it hovers over, it throws an exception from the throwhelper.cs.
This is the exception:
System.ArgumentOutOfRangeException: 'Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')'
This is where it gets thrown:
[DoesNotReturn]
internal static void ThrowArgumentOutOfRange_IndexMustBeLessException()
{
throw GetArgumentOutOfRangeException(ExceptionArgument.index, ExceptionResource.ArgumentOutOfRange_IndexMustBeLess);
}