Thanks for your reply.

I have been looking at the list of issues on Organic Maps repo, they currently have about [2,350 open tickets](https://github.com/organicmaps/organicmaps/issues) with bugs, and some open issues are about strange routing behaviour.  Because OSM data does not contain anything special here about those crossings, no sensible router should ever suggest that cars make a U-turn there.
So, your relation may be a good fix for this one—I have just tested on fresh data and it will now suggest a loop through the adjacent car park, I am not sure this is a good suggestion either—but they will definitely need to fix their own algorithm.