Billboard doesn't work when 2 axis are locked

[la55u]

Problem description:

Let's say I want to create a traffic sign which is always facing to the camera. I want to rotate it only around the Y axis, so it stays vertical. So I set lockX and lockZ on Billboard. What I expect in this scenario is that the sign rotates around the Y axis following the camera. The problem is it doesn't after a certain point.

Relevant code:

https://drei.pmnd.rs/?path=/story/abstractions-billboard--billboard-story&args=lockX:true;lockZ:true

1. Set lockX, lockZ to true and lockY to false.
2. With your pointer rotate the scene in the left/right directions and try to make a full circle.
3. At some point you'll see that the Billboard is not facing to the camera any more as it "flips".

Suggested solution:

Make the "flip" transparent to the user so that it actually always faces the camera.