BeEquivalentTo + Excluding does not work with structs and classes overriding Equals

FluentAssertions 5.4.2, .net 2.1

tt1.Should().BeEquivalentTo(tt2, o => o.Excluding(x => x.Field1)); does not work for struct. See test case below that demonstrate it works for class with fields but does not work for structs with fields.

        public class FF
        {
            public string Field1;
            public string Field2;
        }
        
        public struct SS
        {
            public string Field1;
            public string Field2;
        }

        [Test]
        public void FFT()
        {
            var tt1 = new FF() {Field1 = "1", Field2 = "Same"};
            var tt2 = new FF() {Field1 = "2", Field2 = "Same"};
            tt1.Should().BeEquivalentTo(tt2, o => o.Excluding(x => x.Field1));
        }
        
        [Test]
        public void SST()
        {
            var tt1 = new SS() {Field1 = "1", Field2 = "Same"};
            var tt2 = new SS() {Field1 = "2", Field2 = "Same"};
            tt1.Should().BeEquivalentTo(tt2, o => o.Excluding(x => x.Field1));
        }

[Kikimora]

You making sound point, that types which override Equals should be compared with Equals. This unfortunately comes with inconsistency, since suddenly o => o.Excluding(x => x.Field1) does not work for structs for no apparent reason. Either exception should be thrown or assertions can switch to ComparingByMembers automatically when user request Excluding or similar option. I think that would make a better API and user experience.

[Kikimora]

I find this quite counterintuitive, I think ComparingByMembers should be on by default for structures.