Spring Boot集成Drools7.55.0运行时增删规则偶发ConditionalBranchNode异常

在Spring Boot项目中使用Drools 7.55.0.Final版本，通过org.drools.core.impl.KnowledgeBaseImpl#addPackages实现运行时插入/更新规则，使用org.drools.core.impl.KnowledgeBaseImpl#removeRule删除规则。通常运行正常，但偶发如下异常：

java.lang.RuntimeException: ConditionalBranchNode cannot be shared
    at org.drools.core.reteoo.ConditionalBranchNode.doRemove(ConditionalBranchNode.java:265) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.common.BaseNode.remove(BaseNode.java:150) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.reteoo.ReteooBuilder.removeLeftTupleNode(ReteooBuilder.java:247) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.reteoo.ReteooBuilder.removePath(ReteooBuilder.java:225) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.reteoo.ReteooBuilder.removeNodes(ReteooBuilder.java:203) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.reteoo.ReteooBuilder.removeTerminalNode(ReteooBuilder.java:196) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.reteoo.ReteooBuilder.removeRules(ReteooBuilder.java:177) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.internalRemoveRules(KnowledgeBaseImpl.java:1575) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.lambda$removeRules$7(KnowledgeBaseImpl.java:1568) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:748) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.removeRules(KnowledgeBaseImpl.java:1568) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.mergePackage(KnowledgeBaseImpl.java:1309) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.internalAddPackages(KnowledgeBaseImpl.java:912) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.lambda$addPackages$2(KnowledgeBaseImpl.java:731) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:748) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]
    at org.drools.core.impl.KnowledgeBaseImpl.addPackages(KnowledgeBaseImpl.java:731) ~[drools-core-7.55.0.Final.jar!/:7.55.0.Final]

该异常并非必现，难以定位根因。以下是增/更新规则的代码：

KnowledgeBuilder kb = KnowledgeBuilderFactory.newKnowledgeBuilder();
kb.add(ResourceFactory.newByteArrayResource(content.getBytes()), ResourceType.DRL);

KnowledgeBuilderErrors errors = kb.getErrors();
if (!CollectionUtils.isEmpty(errors)) {
    for (KnowledgeBuilderError error : errors) {
        log.error(error.toString());
    }
    throw new RuntimeException("load rules error");
}
InternalKnowledgeBase kBase = (InternalKnowledgeBase) kieBase;
kBase.addPackages(kb.getKnowledgePackages());

删除规则的代码：

kieBase.removeRule("rules", name);

通过接口触发上述增删操作，同时规则会被kieSession.fireAllRules()调用，请教是否有人遇到过该问题，以及如何解决？

内容的提问来源于stack exchange，提问作者Young