Why is this happening? The movement was just restored!
Every SWCC owner asks that question eventually. It turns out that it is normal. Consider the sequence that occurs periodically:
1. Cam lifts contact and just touches
2. Vibration from motor causes cam to back off slightly
3. Winding Stops
4. Movement advances cam further until next contact occurs.
The above sequence will continue until winding, which is inevitable, finally occurs and completes. Should you worry about it? Absolutely not! Your clock will not stop because of this.
Now, if the movement has never been restored, and the contacts are coated with filth, then it is possible that this could be a sign that the clock is about to give you problems. But a newly restored clock, even after several years, will not give you any problems, even if it is hesitating at the winding.
After perhaps 3-4 years, it is a good idea to have us look at your movement, clean contacts, touch up oil, and inspect for any problems that might be developing (rare).