I used the Ktor example of SuspendApp and generated a jar file.
When run on windows, the process does not terminate on SIGINT (Ctrl+c). Notably, the ktor server shuts down, nevertheless the process still keeps running. When pressing Ctrl+c another time, the processes finally terminates. On linux however (using the same jar), the application terminates gracefully as expected.

fun main() = SuspendApp {
  resourceScope {
    server(Netty) { ... }
    awaitCancellation()
  }
}