Hi,
The OSM map data as it is looks fine - fully connected, with the same tagging as other flares connecting to the roundabout.
https://www.openstreetmap.org/way/194383449/
https://www.openstreetmap.org/way/194383451/

Other routing software uses this OSM data without issue
https://www.openstreetmap.org/directions?engine=fossgis_osrm_car&route=55.07978%2C-1.57205%3B55.07921%2C-1.55425#map=16/55.0791/-1.5631&layers=N

Unfortunately, this suggests the issue is with Tesla - a bad sample of in-car telemetry data perhaps?

Happy Mapping,

James