Rnadom task blocks appeared in the plan connected to a certain task, although these task blocks were not actually linked to that task. For example, the planner selected Order 12345 Op 30 which is linked to Op 40. On the same day as Op 40, it appears that Order 34567, Op 10 is connected via task dependency.
The random task dependency lines appear on the Gantt chart when a planned task has a relation to a non-planned task. The functionality has been enhanced in Orchestrate version 7.83. Please upgrade to this version or above.