random function generate multiple value when access more than once

[mehrdad2000]

Hi I'm using jmeter 5.6.2 with iso8583 plugin.

try to use this groovy script but seems jmeter create two value for field 11 that use random function ${__Random(111111111111,999999999999,)}!

seems random function generate multiple value when access more than once!

if (!vars.getObject('addMac')) {
    def macKey = new javax.crypto.spec.SecretKeySpec(
        org.jpos.iso.ISOUtil.hex2byte('1A1A1A1A1A1A1A1A1A1A1A1A1A1A1A1A'), 'ISO9797ALG3')
    def ssm = new nz.co.breakpoint.jmeter.iso8583.SecurityModule()

    vars.putObject('addMac', { sampler ->
        def msg = sampler.getRequest()
        def p = msg.getPackager()

        def bytes = [0,2,11,12,47].collect {
            p.getFieldPackager(it).pack(msg.getComponent(it))
        }.flatten() as byte[]

        sampler.addField('64', ssm.generateMAC(bytes, macKey, macKey.getAlgorithm()))
    })
}
vars.getObject('addMac').call(sampler)

FYI: main issue report here and developer of this plugin told me this issue related to jmeter 5.6.2!

Would you please fix this issue? Any idea? Thanks