Not at all, drones and other aerial reconnaisance assets very often fly pre-planned trajectories looking around to see what they can find. They reach a target zone and orbit there cheking the situation. This is one example (a manned Boeing E7-A, in this case, orbiting over the Poland eastern border):
View attachment 65075
https://www.itamilradar.com/2024/01/02/new-raaf-surveillance-mission/
It's quite possible (I actually think 'probable') the drone (or what the platform was) was just there orbiting when it happened to spot the 'object', which was then tracked. Once it was decided the object did not present any danger (which is the case if it was a party balloon) it was left to go wherever it pleased. Why waste 3-400K$ to shoot an AIM-9X to a very difficult target (which surely the missile was not designed for, it may not even be able of a successful interception on such a target) plus risking injuries or damages on the ground? That would be, at best, a silly thing to do. There's nothing strange here, and surely no 'borderline trolling', as per your quote.