Yes this would be a legal way to go around the one-way section. It's doable on Mapillary, no restriction. But I'll have a chat with the people from BruMob about this incoherence.
https://graphhopper.com/maps/?point=50.84463%2C4.435707&point=50.841209%2C4.434849&profile=bike&layer=OpenStreetMap