That is indeed the case and we are also bitten by that. The most effective work around we managed to find is to flush periodically (say every 300ms) for a certa

That is indeed the case and we are also bitten by that. The most effective work around we managed to find is to flush periodically (say every 300ms) for a certain timeout period before reading from ES again for checks. Though even then, ITs still fail time to time.