Spock InteractionBuilder doesn't work with spread (*) operator

Describe the bug

Unable to pass spread operator (*) to interaction verification.

To Reproduce

I have a service that is just a wrapper for another class:

class WrapperClass {
    InternalClass internalClass;

    public void firstMethod(String firstArg, String secondArg) {
        internalClass.firstMethod(firstArg, secondArg);
    }

    public void secondMethod(String firstArg, String secondArg, long thirdArg) {
        internalClass.secondMethod(firstArg, secondArg, thirdArg);
    }
}
class InternalClass {

    public void firstMethod(String firstArg, String secondArg) {
        // do smth
    }

    public void secondMethod(String firstArg, String secondArg, long thirdArg) {
        // do smth
    }
}

I am writing the following test that dynamically verifies all wrapper methods:

class WrapperClassTest extends Specification {

    def innerClass = Mock(InnerClass)
    def wrapper = new WrapperClass(innerClass: innerClass)

    @Unroll
    def "test #methodName with args #args"() {
        when:
            wrapper."$methodName"(*args)

        then:
            1 * innerClass."$methodName"(*args)

        where:
            methodName      | args
            'firstMethod'        | ['firstArg', 'secondArg']
            'secondMethod'   | ['firstArg', 'secondArg', 123L]
    }
}

But I am getting the following exception:

groovy.lang.MissingMethodException: No signature of method: org.spockframework.mock.runtime.InteractionBuilder.addEqualArg() is applicable for argument types: (java.lang.String, java.lang.String) values: [firstArg, secondArg]
Possible solutions: addEqualArg(java.lang.Object)

Expected behavior

The test should pass.

Actual behavior

Test fails with the following exception:

groovy.lang.MissingMethodException: No signature of method: org.spockframework.mock.runtime.InteractionBuilder.addEqualArg() is applicable for argument types: (java.lang.String, java.lang.String) values: [firstArg, secondArg]
Possible solutions: addEqualArg(java.lang.Object)

Java version

java version "1.8.0_251"

Buildtool version

Gradle 6.5

What operating system are you using

Windows

Dependencies

spock 1.3 - groovy 2.4

Additional context

No response

Start by reproducing the provided WrapperClassTest example with Spock 1.3 and inspect the InteractionBuilder.addEqualArg() call named in the exception. The issue is done when interaction verification accepts the spread arguments and the dynamic wrapper test passes without MissingMethodException.