Add a container (e.g. Lane) to the canvas. Create two nodes (e.g. Tasks) inside container (e.g. Lane) and connect them with sequence flow. Make sure both Tasks are horizontally aligned and the connector between the Tasks is long enough to perform the line splicing. Create any node on canvas (e.g. Gateway) outside the container. Select the node outside the lane and drag it over the connector and drop it once the sequence flow is "going through" the middle of the node. Move with the container. Actual result The node placed on sequence flow (e.g. Gateway) is placed outside the container. The node may be not visible since the container may cover the node. If you move with the container far enough, the node will be visible. Expected result The node placed on sequence flow (e.g. Gateway) is placed and shown inside the container.