[CuMotion] Can't show trail in Rviz when using Cumotion as the planner

When I use CuMotion as the planner, clicking “Plan” in RViz does not display the trail, even though “Show Trail” is enabled. The path planning itself is successful, but the trail is “not” visualized. However, when I switch to OMPL as the planner, the trail is displayed correctly. Could you please explain why this happens?