Get grid cells to expand to grid-item when the grid item resizes dynamically

I am having an auto-fill grid container. Initially when I add items, the grid cells automatically adjust to the grid-items width and height, however, if I try to dynamically change its size, the grid cells don’t expand to fit the content.

Here’s a demo:

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, auto));
    grid-template-rows: repeat(auto-fill, minmax(100px, auto));
    gap: 10px;
    border: 2px solid black;
    padding: 10px;
    width: fit-content;
}

  .grid-item {
      background-color: lightblue;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid blue;
      padding: 10px;
      min-width: 100px;
      min-height: 100px;
      transition: width 0.3s ease, height 0.3s ease;
  }

.large {
    width: 200px !important;
    height: 200px !important;
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Dynamic Grid Resizing</title>
    <style>
       
    </style>
</head>
<body>

    <button onclick="resizeItem()">Resize Item</button>

    <div class="grid-container">
        <div class="grid-item" id="resizable-item">Resize Me</div>
        <div class="grid-item">Item 2</div>
        <div class="grid-item">Item 3</div>
    </div>

    <script>
        function resizeItem() {
            const item = document.getElementById("resizable-item");
            item.classList.toggle("large");
        }
    </script>

</body>
</html>

As you can see when you press resize, it collapses onto each other.

I’ll be having more items, but above is the MRE. How can I get the grid cells to fit to grid items, even when resized dynamically?