Does the preview change not immediately to another, but after one when changing the bootstrap slider?

Question

css

Good evening! Tell me what was done wrong, that the preview over the slider when flipping the slider starts changing only after 1 slider, that is, the slider and the preview do not match. Here is a link to an example https://jsfiddle.net/kj2msn8j/6/.

Answer 1

Here is a working example in case anyone needs it https://jsfiddle.net/kj2msn8j/8/