Modification of properties even outside "modify" block causes re-evaluation loop by property reactivity.

Issue

Our rules like (*1) and (*2) below, which run successfully on RHDM 7.10.0, cause infinite re-evaluations on after 7.10.1 or later releases. Specifically, Rule 2 causes infinite re-evaluation loop even though value1 property is modified outside modify block in then-clause of Rule 2.

(*1) Example rule

dialect "mvel"

rule "Rule 1"
    when
        $fact : Fact( value1 == null,
                      value2 == null )
    then
        System.out.println("***** Action of " + drools.getRule().getName() + ": $fact = " + $fact);

        modify($fact) {
            value1 = "1"
        }
end

rule "Rule 2"
    when
        $fact : Fact( value1 == "1" )
    then
        System.out.println("***** Action of " + drools.getRule().getName() + ": $fact = " + $fact);

        $fact.value1 = "1";
        modify($fact) {
            value2 = "done"
        }
end

// value1 and value2 are both String-type properties of Fact object.

(*2) Java code

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

Fact fact1 = new Fact();
fact1.setId("fact1");
fact1.setValue1(null);
fact1.setValue2(null);

kSession.insert(fact1);

kSession.fireAllRules();