Using only star emoji as an answer option creates weird bug

We noticed in a meeting today that using star emojis as response options results in a weird bug, where responses are not evaluated correctly.

Here you can see 3 different versions of the same question.
Question 1 has only the star emoji as a voting option, how satisfied the participants were.

According to the evaluation, 100% have chosen the 4 stars - allegedly!

But if you look at the details, you can see that of the 7 answers, all were very different. (picture below)

If you add more / diffrent emojis (option 2) or text to the pure stars (option 3), the feedback works correctly again, as you can see from the pie charts above.

If I use e.g. cars, it worked as it should be...weird isn't it.

What's wrong with those stars that they behave like this? 😅

#bugreport