Repro for #8625

unittest.cs

        public void SyntaxNodeContains()
        {
            var text = "a + (b - (c * (d / e)))";
            var expression = SyntaxFactory.ParseExpression(text);
            var a = expression.DescendantNodes().OfType<IdentifierNameSyntax>().First(n => n.Identifier.Text == "a");
            var e = expression.DescendantNodes().OfType<IdentifierNameSyntax>().First(n => n.Identifier.Text == "e");

            var firstParens = e.FirstAncestorOrSelf<ExpressionSyntax>(n => n.Kind() == SyntaxKind.ParenthesizedExpression);

            Assert.False(firstParens.Contains(a));  // fixing #8625 allows this to return quicker
            Assert.True(firstParens.Contains(e));
        }