Knowing what the person in front smokes will change the probability that the person behind will win the lottery.
Take a common example, the coin toss problem.
The probability of calculating two consecutive heads is 1/4, and the probability of the second head is 1/2. The second head here is equivalent to the person who knows the previous result in the lottery.
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As for the five people you added to draw lots at the same time, the draw was already over when it was announced, which is of course fair to everyone. If the first 1 person draws lots and reveals the lottery results, then the second person draws lots again, then it belongs to knowing the previous lottery results, and the probability of the latter person has changed.