Problems with the appearance of a drop-down list on ios devices, can anyone previously encountered a similar problem?

Question

JavaScript

The help of a person who can test the behavior of this input on ios devices or someone who has used this loopj.com/jquery-tokeninput library or may have previously encountered a similar problem is needed.

I use this library on my site. Works well on Android and Windows devices. Problems arise when you try to start a search on ios devices (tested on iphone 8), namely, a drop-down list does not appear with options from which you choose the one you need, which should appear after two entered characters. It will appear only after you delete the last 2 characters ("er") from the entered word (for example "Dexter").

I broke my whole head while studying the code of this library, at first I thought that the problem was in the triggered event (keyup, keydown, keypress, onchange), that ios conflicted with it, I tried to replace it, it did not help. Further, I thought that the problem was in the setTimeout in the do_search search function, removed it, but in the end it did not work.