Absent Code attribute in method that is not native or abstract in class file android/content/Context

[AlexeyKolosov]

Hi, I'm using your hidden API, but having an issue with tests:
For unknown reason I can't mock android classes, such as Content in my Android project unit tests. So it gives error:

"Absent Code attribute in method that is not native or abstract in class file android/content/Context"
The example of a functionality and a test:

class SomeClassWithAndroidClass(
    private val context: Context // this even is not used, but fails
) {
    val myField = 42
}

class SomeClassWithAndroidClassTest {
    @Test // import org.junit.jupiter.api.Test
    fun `Verify field`() {
        val someClassWithAndroidClass = SomeClassWithAndroidClass(mockk())
        assert(someClassWithAndroidClass.myField == 3)
    }
}

I use jupiter version 5.8.1, junit platform version 1.8.1, mockk version 1.12.0, kotlin version 1.6.21 in build.gradle I have:

android {
    testOptions {
        unitTests.returnDefaultValues = true
        unitTests.all {
            useJUnitPlatform()
        }
    }
   ...

     compileSdkVersion 30
     defaultConfig {
         minSdkVersion 28
         targetSdkVersion 30
     }
   ...
}

Maybe you have an idea, what can resolve this?