When aggregating some simple (convex, <6 vertices) polygons via repeated unions I get this panic:

thread 'main' panicked at 'Sweep line misses event to be removed', src/main.rs:1:1

I managed to create a .geojson fixture that provokes the panic:

The black polygon is my aggregate, the orange one the one I want to union.
Nudging the marked vertex unpanics the situation.

EDIT: added image, added fixture, more informations