Cannot interact with all visible flow arrows when animationEnabled is true

[pete-naish-skyral]

Expected Behavior

It should be possible to interact with both arrows between points when animationEnabled = true.

Actual Behavior

Only one of the two arrows is interactive.

Steps to Reproduce

1. Go to https://visgl.github.io/flowmap.gl/
2. With the default settings, note that animationEnabled is false
3. Find two points that have arrows pointing in both directions between them
4. Hover over each arrow and observe the data in the tooltip changes
5. Check the animationEnabled checkbox
6. Hover over the same two arrows and observe the issue - only one of the two arrows is interactive

Video

Here's a screen recording.