The polyline segments sometimes do not display when updated.

**Describe the bug**
The polyline segments sometimes do not display when updated.

**To Reproduce**
Steps to reproduce the behavior:
1. I added a button that, when clicked, adds the center point of the screen to the route.
2. When I add center points in different directions, sometimes the line segment in one direction doesn’t display. Only after adding a few more points does the line segment appear complete.

**Screenshots**
If applicable, add screenshots to help explain your problem.