A Button randomly stops working after a few clicks (JavaScript)

So, I have a table with some rows. There is a dropdown button in each row. When I click on the dropdown it should open. This is working at the beginning and then randomly stopping. I tried hard debugging it but came to nothing. Here’s a video to give you a better idea:

Video Link

Here’s the code for handling the buttons:

// Money Chooser Drop Down
const drop_btns = document.getElementsByClassName("investment-amount-drop-ic");
// console.log(drop_btns.length);
for (var i = 0; i < drop_btns.length; i++) {
  drop_btns[i].addEventListener("click", function (e) {
    var target_ic = e.target;
    var par = this.parentElement;
    // console.log((par.children[2].style.display = "block"));
    par.children[2].classList.add("show");
    var potential_profit_row =
      par.parentElement.parentElement.children[3].children[0];
    var profit_map = {
      "$ 25": "44",
      "$ 50": "110",
      "$ 75": "137",
      "$ 100": "170",
    };

    const dropdown = par.children[2];
    const dropdown_items = dropdown.children;
    // const amount_label  = par

    for (var i = 0; i < dropdown_items.length; i++) {
      dropdown_items[i].addEventListener("click", function (e) {
        par.children[0].innerText = e.target.innerText;
        potential_profit_row.innerText = "$ " + profit_map[e.target.innerText];
      });
    }
    window.addEventListener("click", function (e) {
      if (e.target != target_ic && e.target != dropdown) {
        par.children[2].classList.remove("show");
      }
    });
  });
}
<table>
  <tbody>
    <tr>
      <td class="invest-action">
        <div class="btn-invest-amount">
          <span class="amount">$ 25</span>
          <div class="investment-amount-drop-ic">
            <i class="fa-solid fa-angle-down"></i>
          </div>

          <div class="btn-invest-list">
            <div class="invest-list-item">$ 25</div>
            <div class="invest-list-item">$ 50</div>
            <div class="invest-list-item">$ 75</div>
            <div class="invest-list-item">$ 100</div>
          </div>
        </div>
        <button class="invest-now-btn">Trade Now</button>
      </td>
    </tr>
  </tbody>
</table>

Check the jsFiddle

If you can’t find an exact solution any ideas about why this is happening will be much appreciated.