Possible issue with array configuration properties

[nicolatimeus]

Describe the bug I defined a Kura service with the following metatype:

<MetaData xmlns="http://www.osgi.org/xmlns/metatype/v1.2.0" localization="en_us">
    <OCD id="org.eclipse.kura.internal.rest.provider.RestService" 
         name="RestService" >
        
        <AD id="allowed.ports"
            name="Allowed ports"
            type="Integer"
            cardinality="3"
            required="false"
            min="1"
            max="65535">
        </AD>
    </OCD>
    
    <Designate pid="org.eclipse.kura.internal.rest.provider.RestService">
        <Object ocdref="org.eclipse.kura.internal.rest.provider.RestService"/>
    </Designate>
</MetaData>

I couldn't update the value of the allowed.ports parameter from the Devices -> device entry -> Configuration section of Kapua web console. The configuration sent by the cloud through CONF-V1 doesn't contain the value of the parameter even if it is specified in the Web UI:

<?xml version="1.0" encoding="UTF-8"?>
<esf:configurations xmlns:esf="http://eurotech.com/esf/2.0" xmlns:ns0="http://www.osgi.org/xmlns/metatype/v1.2.0" xmlns:ocd="http://www.osgi.org/xmlns/metatype/v1.2.0">
   <esf:configuration pid="org.eclipse.kura.internal.rest.provider.RestService">
      <esf:properties/>
   </esf:configuration>
</esf:configurations>

To Reproduce Define a Kura service with the metatype above and try to update the value of the allowed.ports parameter using Kapua console.

Expected behavior The configuration change is applied by the device