Hello Meinew,

Splitting the roundabout may be an purpose and was indeed in this case. We discussed a lot about the best practise for roundabouts in the french OSM community (see the feed here https://forum.openstreetmap.fr/t/cartographier-les-rond-points/24548/15). Please check the next time you want to have one single roundabout object if there relations onto this roundabout - and if yes please let the roundabout as it is. This could save us a lot of time to correct the relations.

Thanks in advance and best regards,

Patchi.