Cascading suite xml's are not run from jar with -xmlpathinjar, only initial xml

TestNG Version

Note: only the latest version is supported 7.6.1, 7.3.0

Expected behavior

When running XML from a jar, and that XML includes a suite-file, TestNG should look in the jar for that file as well

Actual behavior

TestNG looks on disk instead of in the jar C:\Users\brucer\SuiteTEST>java -cp ./* org.testng.TestNG -testjar TestngEmbeddedSuitesTest-0.0.1-SNAPSHOT-jar-with-dependencies.jar -xmlpathinjar src/TestNG/masterSuite.xml [TestNG] [ERROR] java.io.FileNotFoundException: C:\Users\brucer\SuiteTEST\src\TestNG\suite1.xml (The system cannot find the path specified)

Is the issue reproducible on runner?

[X] Shell
[ ] Maven
[ ] Gradle
[ ] Ant
[ ] Eclipse
[ ] IntelliJ
[ ] NetBeans

Test case sample

Please, share the test case (as small as possible) which shows the issue

src/TestNG/Suite1.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Service Operations tests" parallel="none">
    <parameter name="TakeScreenShotOnFailure" value="true" />
  <parameter name="EnvProfile" value="UAT_OPERATIONS"/>
    <test name="Test Patients tests">
        <classes>
            <class name="org.testng.test.class1" >
                <methods>
                    <include name="method1" />
                </methods>
            </class>
        </classes>
    </test> <!-- Test -->
</suite> <!-- Suite -->

src/TestNG/Suite2.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd">
<suite name="Service Operations tests" parallel="none">
    <parameter name="TakeScreenShotOnFailure" value="true" />
  <parameter name="EnvProfile" value="UAT_OPERATIONS"/>
    <test name="Test Patients tests">
        <classes>
            <class name="org.testng.test.class2" >
                <methods>
                    <include name="method1" />
                </methods>
            </class>
        </classes>
    </test> <!-- Test -->
</suite> <!-- Suite -->

src/TestNG/masterSuite.xml:

<!DOCTYPE suite SYSTEM "https://testng.org/testng-1.0.dtd" >
<suite name="Main suite"> <!--commenting parallel="suite-file" thread-count="2" -->
    <test name="Test Patients tests">
        <classes>
            <class name="org.testng.test.class1" >
                <methods>
                    <include name="method1" />
                </methods>
            </class>
        </classes>
    </test> <!-- Test -->
    <suite-files>
        <suite-file path="src/TestNG/suite1.xml" />
        <suite-file path="src/TestNG/suite2.xml" />
    </suite-files>
</suite>

org/testng/test/class1.java

package org.testng.test;
import org.testng.annotations.Test;
public class class1 {

    public class1() {
    }
    @Test
    public void method1()
    {
        System.out.println("Executing class 1 method1");
    }
}

org/testng/test/class2.java

package org.testng.test;
import org.testng.annotations.Test;
public class class1 {

    public class1() {
    }
    @Test
    public void method1()
    {
        System.out.println("Executing class 2 method1");
    }
}

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testng-team / testng