Thanks for the report — i tested this extensively, in the editor and in a normal game, and the tower works as intended.
In the natural storm: bolts are spread over a wide area, so many of them strike outside the tower's range and are caught by other lightning rods nearby. The tower's priority only decides who gets a bolt among the attractors that cover the strike point — it cannot pull in a bolt that falls beyond its reach, no matter how high the priority is.
The test also showed the opposite case: a legendary tower, with its much larger range, catches nearly every natural bolt around it. That confirms the tower's higher priority still applies at quality — the range is what changes, not the priority.
If you give me a screenshot or a description of your setup, I can try to reproduce the problem.
Until then, I can't identify any errors.