Creating a cannon mission - help needed

I have been trying to make a couple of cannon missions for my map. The mission shows up on the map, I can start it, cannons and targets are all there, I can shoot the cannons, and when hitting a target it gets registered as destroyed.

Although no matter how I configure it I cant get any sort of success or fail screen to show up unless I hit ALL targets. Another issue I have is that if the cannon mission's start trigger is overlapping any other missions start trigger it bugs out trying to switch between missions (will change once then I cant go back and forth after the first switch). Lastly when I drive to the mission trigger and before I hit start it will occasionally have all the stars crossed out saying "stars can only be completed with default settings" - that happens every now and then even without changing any settings.

Im still new to creating missions, but I have made dozens of other working missions, a lot of which have overlapping start triggers, and NONE of the other missions have any of the issues mentioned above - its only the cannon missions.

I have tried making it from scratch in the mission editor. I have tried copy\pasting a working cannon mission and then changing it to show up in my map using my start trigger location - without changing other known working settings. I used my own prefabs for targets\cannons and even tried using a known working one from another map without changing anything. No matter what I do it seems like the cannon missions are bugged. I would appreciate it if anyone has any insight on what the problem might be? I am happy to answer questions or provide screenshots if needed.

Thank you.