Property reactivity inconsistent behavior when modify-block is placed inside a block like if-block in RHS

Issue

When modify-block is placed inside a block like if-block in RHS (then-clause),

if (<condition>) {
    modify(<fact object>) {
        <property> = <value>
    }
}

the modify does not work correctly in non-executable model. For example, when I execute the Java code (*2) with the rules (*1), value1 property is modified to 2 in then-clause of Rule 1 so the rule Rule 2 should be fired like (*3-1) but actually not fired like (*3-2).

(*1) Example rules

dialect "mvel"

rule "Rule 1"
    when
        $fact : Fact( value1 == 1 )
    then
        System.out.println("***** Action of " + drools.getRule().getName() + ": $fact = " + $fact);

        if (true) {
            modify($fact) {
                value1 = 2
            }
        }
end

rule "Rule 2"
    when
        $fact : Fact( value1 == 2 )
    then
        System.out.println("***** Action of " + drools.getRule().getName() + ": $fact = " + $fact);
end

(*2) Example Java code

KieServices kServices = KieServices.Factory.get();
KieContainer kContainer = kServices.getKieClasspathContainer();
KieSession kSession = kContainer.newKieSession();

Fact fact = new Fact();
fact.setValue1(1);
kSession.insert(fact);

System.out.println("***** start");
kSession.fireAllRules();
System.out.println("***** end");

(*3-1) Expected result

***** start
***** Action of Rule 1: $fact = com.example.reproducer.Fact[value=1]
***** Action of Rule 2: $fact = com.example.reproducer.Fact[value=2]
***** end

(*3-2) Actual result

***** start
***** Action of Rule 1: $fact = com.example.reproducer.Fact[value=1]
***** end