BIG-IQ error discovering LTM config - Error transforming Profile TCP

Attempting to re-discover LTM config on a pair of devices and encountering the following error - has anyone had similar?

Discovery Failed

Error while transforming Profile TCP, message 'java.lang.NumberFormatException: For input string: "indefinite"' was returned

[ERROR][08 Mar 2018 15:35:49 GMT][/cm/adc-core/tasks/discover-config/f9678120-18ad-458e-a85d-d03a79aa7f40/worker AdcDiscoveryTaskWorker] Error while transforming Profile TCP, message 'java.lang.NumberFormatException: For input string: "indefinite"' was returned : com.google.gson.JsonSyntaxException: java.lang.NumberFormatException: For input string: "indefinite"
        at com.google.gson.internal.bind.TypeAdapters$11.read(TypeAdapters.java:323)
        at com.google.gson.internal.bind.TypeAdapters$11.read(TypeAdapters.java:313)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:129)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:220)
        at com.google.gson.Gson.fromJson(Gson.java:887)
        at com.google.gson.Gson.fromJson(Gson.java:952)
        at com.google.gson.Gson.fromJson(Gson.java:925)
        at com.f5.rest.common.RestOperation.fromJson(RestOperation.java:3081)
        at com.f5.rest.workers.adccore.transform.MetadataTransformWorker.transformFromDevice(MetadataTransformWorker.java:81)
        at com.f5.rest.workers.adccore.ltm.profile.tcp.AdcProfileTcpTransformWorker.transformFromDevice(AdcProfileTcpTransformWorker.java:123)
        at com.f5.rest.workers.adccore.transform.BaseJsonTransformWorker.transformIControlRestPodoToJavaPodo(BaseJsonTransformWorker.java:141)
        at com.f5.rest.workers.configmgmtbase.task.discovery.DefaultIndividualDiscoveryHelper.transformIcrdObjectsInline(DefaultIndividualDiscoveryHelper.java:85)
        at com.f5.rest.workers.configmgmtbase.task.discovery.DefaultIndividualDiscoveryHelper.transformIcrdObjects(DefaultIndividualDiscoveryHelper.java:137)
        at com.f5.rest.workers.configmgmtbase.task.discovery.BaseDiscoveryHelper.processDiscovery(BaseDiscoveryHelper.java:228)
        at com.f5.rest.workers.configmgmtbase.task.discovery.BaseDiscoveryHelper.updateStep(BaseDiscoveryHelper.java:198)
        at com.f5.rest.workers.configmgmtbase.task.discovery.BaseDiscoveryHelper.processDiscovery(BaseDiscoveryHelper.java:221)
        at com.f5.rest.workers.configmgmtbase.task.discovery.BaseDiscoveryHelper.updateStep(BaseDiscoveryHelper.java:198)
        at com.f5.rest.workers.configmgmtbase.task.discovery.BaseDiscoveryHelper$2.completed(BaseDiscoveryHelper.java:385)
        at com.f5.rest.workers.configmgmtbase.task.discovery.BaseDiscoveryHelper$2.completed(BaseDiscoveryHelper.java:361)
        at com.f5.rest.common.RestOperation.complete(RestOperation.java:2699)
        at com.f5.rest.common.ApacheAsyncRequestSender.lambda$completeRequestOnNonBlockingPool$2(ApacheAsyncRequestSender.java:339)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NumberFormatException: For input string: "indefinite"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Long.parseLong(Long.java:589)
        at java.lang.Long.parseLong(Long.java:631)
        at com.google.gson.JsonPrimitive.getAsLong(JsonPrimitive.java:238)
        at com.google.gson.internal.bind.JsonTreeReader.nextLong(JsonTreeReader.java:229)
        at com.google.gson.internal.bind.TypeAdapters$11.read(TypeAdapters.java:321)
        ... 27 more

[ERROR][08 Mar 2018 15:35:49 GMT][/cm/adc-core/tasks/discover-config/f9678120-18ad-458e-a85d-d03a79aa7f40/worker AdcDiscoveryTaskWorker] Error while transforming Profile TCP, message 'java.lang.NumberFormatException: For input string: "indefinite"' was returned