There's an `only_left_turn` (Relation: 9884251) restriction imposed between the Way: High Street (476407955) and the Way: Weatherby Gardens (6058750) via Node: 4700018394.  Is there a chance this restriction is reversed?  Looks like the mandatory left turn should be affecting the Way: High Street (710721736), not Way: High Street (476407955).

This could be an issue causing routing engines to reroute away and around this segment of road.