If you wear it 24/7 could be that you don't move your arms enough. Could be the balance wheel got damaged while you were adjusting the timing. But could be other things since I am not a watch repair man. Probably cheaper to buy another one than have a jeweler look at it. But I have not had this problem with my 3 Vostoks but obviously, I don't wear them all the time.I have been loving it. It runs a little fast but just reset it every few weeks. It does completely stop every once in a while though.