You don't say what version you are running. I have not really had any problems on Kraken with any bot since 4.0.1, except for strange BB calculations. 5.0.1 has the Kraken price precision drop built in (and all versions younger then that), and since 4.0.1 we have a dust handler. So, the only usable versions on Kraken are 5.0.1. and onwards, or in release dates, it must be 11.9.17 or newer, beacuse the last price precision reduction on Krak was implemented in the first week of september 2017. Older versions are not adjusted to this precision reduction.