Random shapes added to document when zooming in

So I drew this circular shape with the pen tool:

But when I zoom in to about 65%, there are random bits that are added to the shape already drawn, one appears in the bottom center and the other to the first one's right, as the following picture shows:

I'm using Adobe Photoshop 22.0.0, and the document settings are the following:

• RGB Color.
• 16 bits/Channel.