Is this a movement issue?

[WWC]

The watch has stopped as the power reserve has wound down. It is now when I start to end the crown on it’s winding position for about 60 turns and the seconds hand does not move whatsoever.

I then proceed to lightly shake the watch and the seconds hand starts to move. Immediately lay it at rest to see if it would stop as the light jerk should supposedly last under a minute.

To my surprise the watch has kept running for over 12 hours now and it seems like the initial wind did raise the power reserve back up.

Should I be concerned that the seconds hand doesn’t move as I start winding it? With my other watches the second hand starts moving about 10-20 turns after the power reserve has died off.

The watch I’m talking about is the 15710st diver with a 3120 movement. I wonder if anybody else has also encountered this issue and care to share.

Thanks!