Here's my method decorated with the refit post attribute
[Post("/api/v2/picking/{taskId}/details/{id}/updateStatus?pickingStatus={pickingStatus}")]
Task UpdateItemStatus(int taskId, int id, PickingStatus pickingStatus);
but here is how the request looks like with added url encoded chars
"/api/v2%E2%80%8B/picking/8637%E2%80%8B/details/27754/updateStatus?pickingStatus=10"
so I get an 404 error
Thanks for you insight.