How to get Nigara ribbon to maintain consistent size throughout lifecycle?

Streamable showing the problem - Watch 2024-06-01 19-32-40 | Streamable

The niagara ribbons are attached to a particle. At the start, they have the perfect size and length, but towards the end, they stretch inwards. How do I stop this nonsense and make them have the same size for the entire lifespan?

Many thanks