UA conducts probing attacks routinely, as do the orcs. Kinburn Spit, is one example of multiple probing incursions by UA forces over the past several months. Sometimes, it's just raids, other times, it's more complex in purpose and scale. Most recently, it was to destroy an ammo depot there.

Ukrainian Navy destroys ammunition depot on Kinburn Spit in Black Sea

The Kinburn Spit, a strategic location in the Black Sea, has been under Russian occupation, making it a key target for Ukrainian military operations.