Filter Exception, Invalid request: filter not found

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Filter Exception, Invalid request: filter not found

I'm using a custom contract customEventFlowable(filter).subscribe(()->{...}) to filter through that event, the filter is created by:

EthFilter eFilter = new EthFilter(DefaultBlockParameterName.LATEST, DefaultBlockParameterName.LATEST, contractAddress);
eFilter.addSingleTopic(EventEncoder.encode(Contract.CUSTOM_EVENT));

The odd thing is that I run it multiple times and once it went through without error. I have no idea how to solve it, as the event is being added to the event filter.

Environment

Describe the environment in which the issue occurs

• Web3j 4.9.8
• Java 17.0.9
• Operating System, MacOS M2

Additional context

Stacktrace:

org.web3j.protocol.core.filters.FilterException: Invalid request: filter not found
        at org.web3j.protocol.core.filters.Filter.throwException(Filter.java:200)
        at org.web3j.protocol.core.filters.Filter.getInitialFilterLogs(Filter.java:123)
        at org.web3j.protocol.core.filters.Filter.run(Filter.java:72)
        at org.web3j.protocol.rx.JsonRpc2_0Rx.run(JsonRpc2_0Rx.java:89)
        at org.web3j.protocol.rx.JsonRpc2_0Rx.lambda$ethLogFlowable$2(JsonRpc2_0Rx.java:79)
        at io.reactivex.internal.operators.flowable.FlowableCreate.subscribeActual(FlowableCreate.java:71)
        at io.reactivex.Flowable.subscribe(Flowable.java:14479)
        at io.reactivex.internal.operators.flowable.FlowableMap.subscribeActual(FlowableMap.java:37)
        at io.reactivex.Flowable.subscribe(Flowable.java:14479)
        at io.reactivex.Flowable.subscribe(Flowable.java:14416)
        at io.reactivex.Flowable.subscribe(Flowable.java:14337)