firstSpawnTime And Interval Behavior should be expected.

[gadget114514]

Current implementation: Start -> first spawn time -> [spawn] -> firstspawntime -> [spawn] -> interval(fixedDelayBetweenSpawns) -> [spawn]

Expected implementation: Start -> first spawn time -> [spawn] -> interval(fixedDelayBetweenSpawns) -> [spawn] -> interval(fixedDelayBetweenSpawns)

Fix code: void SetupTimer() { timeLeft = firstSpawnTime; ElapsedBehaviour(); // set interval

        Elapsed += Spawn;
        Elapsed += ElapsedBehaviour;

if UNITY_EDITOR

        UltimateLog(string.Format("SetupTimer"));

endif

    }