Routing problem, simple short example on Interstate

Routing problem, simple short example on Interstate:

Why will it not stay on the Interstate? Just ignores way points 1 - 4

There was no road motorway in OSM, only a line design. I changed.
Check result later, now wait until is updated in the Kurviger router.
Some local OSM contributor should control !
(I asked for by uploading the change)
Missing motorway by Open Topomap display

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