Since yesterday, my BB58 is playing up. It stops randomly, and then starts again when you shake it a bit. This doesn’t seem to be a winding problem. Hacking it also seems to stop it, but pushing the crown back in doesn’t start it again. It needs a little shake.

It’s very odd and driving me crazy. I suspect it’s likely to need a trip back to Tudor but does anyone know what’s likely to be going wrong with it?