RSRP-469326: C# unit test Ignore spills into subsequent tests

In the example below, only Test1 is set to be ignored, but at the start of the test session, as well as during test execution, also
test2, test3 is marked as Ignored, with the ignore text from Test0.

To reproduce, use the following code, and start the tests by clicking to run category "LongRunningX".
After the test execution the correct marking is shown




[TestFixture]
[Category("LongRunningX")]
internal class Test0
{
[Test]
public void Sleeper()
{
System.Threading.Thread.Sleep(10000);
}
}

[TestFixture]
[Ignore("IGNORE TEST TEXT")]
[Category("LongRunningX")]
internal class Test1
{
}

[TestFixture]
[Category("LongRunning")]
[Category("LongRunningX")]
internal class Test2 {
[Test]
public void Sleeper()
{
System.Threading.Thread.Sleep(10000);
}
}

[TestFixture]
[Category("LongRunningX")]
internal class Test3
{
}