I have a Steinhart Nav B II chrono with a 7750 movement with a recurring issue. When I run the chrono, the minutes counter gets stuck at 10 minutes. normally the seconds and hours continue to count up, but today the whole watch stopped when it hit 10 minutes, then restarted after a slight tap. The watch is under warranty, but I am in Australia, and shipping back to Germany won't be cheap. Is this a known or easily fixed issue with the 7750, or should I be expecting an expensive fix? If it's a simple fix, I'll just take it to my watchmaker. I should note that the minutes also don't reset prefectly aligned, but sit just to the left of zero when reset. Any assistance greatly appreciated.