Regex incorrectly identify surrogate pair unicode category

This defect makes regex useless when you need to match string using unicode categories and string could contain surrogate pairs:

        [Test]
        public void ClassifySurrogates_Test()
        {
            var value = "𦕒";
            var regexLetters = new Regex(@"^\p{Lo}$");

            var regexSurrogates = new Regex(@"^\p{Cs}{2}$");

            Assert.AreEqual(UnicodeCategory.OtherLetter, char.GetUnicodeCategory(value, 0));
            Assert.AreEqual(UnicodeCategory.OtherLetter, CharUnicodeInfo.GetUnicodeCategory(value, 0));
            Assert.True(regexSurrogates.IsMatch(value));

            // Fails here
            Assert.True(regexLetters.IsMatch(value));
        }