Restcomm ClassCastException during creating SBB child relation - parent-child

Question

I'm trying to create SBB child on Restcomm, most of the times I encounter this exception:
java.lang.ClassCastException:
com.edafa.slee.http.sbb.api.HttpSbbLocalObjectImpl cannot be cast to
com.edafa.slee.http.sbb.api.HttpSbbLocalObject
Where HttpSbbLocalObject is the sbb-local-object of the child SBB
Kindly find some useful information which may help you to answer me:
HttpSbbLocalObject in a separate library named http-sbb-api-lib
this is the library-ref in the child sbb-jar.xml:
<library-ref>
<library-name>http-sbb-api-lib</library-name>
<library-vendor>Edafa</library-vendor>
<library-version>1.0.3-SNAPSHOT</library-version>
</library-ref>
this is the sbb-local-interface declaration in the child sbb-jar.xml:
<sbb-local-interface>
<sbb-local-interface-name>
com.edafa.slee.http.sbb.api.HttpSbbLocalObject
</sbb-local-interface-name>
</sbb-local-interface>
this is the library-ref in the parent sbb-jar.xml:
<library-ref>
<library-name>http-sbb-api-lib</library-name>
<library-vendor>Edafa</library-vendor>
<library-version>1.0.3-SNAPSHOT</library-version>
</library-ref>
this is the sbb-ref in the parent sbb-jar.xml:
<sbb-ref>
<sbb-name>http-sbb</sbb-name>
<sbb-vendor>Edafa</sbb-vendor>
<sbb-version>2.0.0-SNAPSHOT</sbb-version>
<sbb-alias>http-sbb-child</sbb-alias>
</sbb-ref>
this is the child-relation-method in the parent sbb-jar.xml:
<get-child-relation-method>
<sbb-alias-ref>http-sbb-child</sbb-alias-ref>
<get-child-relation-method-name>
getHttpActorLocalObject
</get-child-relation-method-name>
<default-priority>0</default-priority>
</get-child-relation-method>
this is the child-relation-method-declaration in the parent SBB:
public abstract ChildRelation getHttpActorLocalObject();
this is the child creation in parent:
httpSbbLocalObject=(HttpSbbLocalObject) getHttpActorLocalObject().create();
on the above point the exception happened
"java.lang.ClassCastException: com.edafa.slee.http.sbb.api.HttpSbbLocalObjectImpl cannot be cast to com.edafa.slee.http.sbb.api.HttpSbbLocalObject"
I tried many trials to solve this problem but unfortunately there's no useful result.
Kindly find some useful notes which you must consider:
HttpSbbLocalObject is the sbb-local-object of the child SBB
this problem happen on runtime not on deployment
sometimes the SBB child created successfully by redeploying all the DUs
I tried the same DUs successfully on Opencloud-Rhino without any issue
I use restcomm-slee-7.2.0-158.76-wildfly-10.1.0.Final
Please I need any useful piece of advice which help me to solve this exception