text: saw on Mapillary a bus heading westbound through the loop, so from Robina to Oakwood. Still not sure how it actually gets to Robina, from streetcar right-of-way is my guess but I haven't seen it. When I updated relation for 63B https://www.openstreetmap.org/relation/7888761 I just ended it at St. Clair since it doesn't seem to have stops beyond the one on southeast corner of Oakwood/St. Clair anyway. But a confirmation of what's going on with the loop might help.