iosのみドロワーメニューが出現しない（レスポンシブ時）

webサイト上にサイトを公開した際、レスポンシブ状態のpcやアンドロイド端末では左右から出現するドロワーメニューが、iPhoneでは出現せず、ここ2日悩まされております。z-indexの問題かなと対策を調べ実践してみたのですがうまくいかず、。

見た目は表示されていないように見えるのですが、ドロワーメニューを開いたときになぜかその中にあるリンクはタップすることができます。
どなたか解決策を教えて頂けたらとても嬉しいです。。

HTML

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link href="https://use.fontawesome.com/releases/v5.6.1/css/all.css" rel="stylesheet">
    <link rel="stylesheet" href="../css/main.css">
    <link rel="stylesheet" href="https://unpkg.com/swiper/css/swiper.css">
    <link rel="stylesheet" href="../css/swiper.css">
    <link href="https://fonts.googleapis.com/css?family=Lato&display=swap" rel="stylesheet">
    <link href="https://fonts.googleapis.com/css?family=Josefin+Sans&display=swap" rel="stylesheet">
    <title>landing page</title>
</head>
<body>               
        <div class="header2">
            <input type="checkbox" class="openSidebarMenu" id="openSidebarMenu">
            <label for="openSidebarMenu" class="sidebarIconToggle">
              <div class="spinner diagonal part-1"></div>
              <div class="spinner horizontal"></div>
              <div class="spinner diagonal part-2"></div>
            </label>
          <div id="sidebarMenu">
            <ul class="sidebarMenuInner">
              <li><a href="#" target="_blank">Home</a></li>
              <li><a href="#" target="_blank">Events</a></li>
              <li><a href="#" target="_blank">Profile</a></li>
              <li><a href="#" target="_blank">Log out</a></li>
            </ul>
          </div>
       
          <input type="checkbox" class="openSidebarSearch" id="openSidebarSearch">
          <label for="openSidebarSearch" class="sidebarIconSearch">
            <i class="fas fa-search search_icon"></i>
          </label>
        
                <div id="sidebarSearch">
                  <div class="search-erea">
                    <div class="search-title">Enter the name of event</div>
                      <input type="text" class="search_text">
                    <div class="search-erea">
                      <div class="search-title">Day</div>
                      <input type="text" class="Day-box">
                    </div>
        
                </div>
        
              </div>
            
        <div class="background-img">  
        </div>
</body>
</html>

CSS


#chk {
  position: absolute;
  visibility: hidden;
  z-index: -1111;
}

.header2{
  display: none;
}

@media screen and (max-width: 767px) {

  #header {
    display: none;
  }
  .header2 {
    display: block;
    width: 100%;
    max-width: 100%;
    -webkit-box-shadow: none;
            box-shadow: none;
    position: fixed;
    height: 50px;
    background: #2D2524;
    overflow: hidden;
    z-index: 10;
  }
  .background-img {
    color: #000000;
    height: 100vh;
    width: 100%;
  }

  #sidebarSearch {
    position: relative;
    height: 100%;
    left: 0;
    width: 100%;
    margin-top: 50px;
    -webkit-transform: translateX(1500px);
            transform: translateX(1500px);
    -webkit-transition: -webkit-transform 0.6s ease-in-out;
    transition: -webkit-transform 0.6s ease-in-out;
    transition: transform 0.6s ease-in-out;
    transition: transform 0.6s ease-in-out, -webkit-transform 0.6s ease-in-out;
    background: #454545;
    color: #fff;
    position: fixed;
    text-align: center;
  }
  .sidebarIconSearch i {
    color: #fff;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    cursor: pointer;
    position: absolute;
    top: 16px;
    right: 25px;
    z-index: 99;
    font-size: 20px;
  }
  input[type="checkbox"]:checked ~ #sidebarSearch {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }
  input[type="checkbox"]:checked ~ #sidebarSearch ~ .sidebarIconToggle {
    display: none;
  }
  .openSidebarSearch {
    float: right;
  }
  .search-title {
    font-size: 20px;
    font-weight: bold;
    margin: 20px 0 10px;
  }
  .search_text {
    outline: none;
    height: 30px;
    width: 60%;
    border: solid 3px #fff;
    background: none;
    border-radius: 30px;
    color: #fff;
    padding: 0 20px;
    font-size: 16px;
  }

  #select {
    width: 60%;
  }
  #sidebarMenu {
    position: relative;
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0;
    margin-top: 50px;
    -webkit-transform: translateX(-1500px);
            transform: translateX(-1500px);
    -webkit-transition: -webkit-transform 0.6s ease-in-out;
    transition: -webkit-transform 0.6s ease-in-out;
    transition: transform 0.6s ease-in-out;
    transition: transform 0.6s ease-in-out, -webkit-transform 0.6s ease-in-out;
    background: #454545;
  }
  .sidebarMenuInner {
    position: absolute;
    text-align: center;
    top: 40%;
    left: 50%;
    -webkit-transform: translateY(-50%) translateX(-50%);
            transform: translateY(-50%) translateX(-50%);
    margin: 0;
    padding: 0;
  }
  .sidebarMenuInner li {
    text-align: center;
    list-style: none;
    color: #fff;
    text-transform: uppercase;
    font-weight: bold;
    font-size: 20px;
    padding: 30px;
    cursor: pointer;
  }
  .sidebarMenuInner li a {
    color: #fff;
    text-transform: uppercase;
    font-weight: bold;
    cursor: pointer;
    text-decoration: none;
  }
  input[type="checkbox"]:checked ~ #sidebarMenu {
    -webkit-transform: translateX(0);
            transform: translateX(0);
  }
  input[type="checkbox"]:checked ~ #sidebarMenu ~ .sidebarIconSearch {
    display: none;
  }
  input[type="checkbox"]:checked ~ #sidebarMenu ~ #sidebarSearch {
    display: none;
  }
  input[type=checkbox] {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    display: none;
  }
  .sidebarIconToggle {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    cursor: pointer;
    position: absolute;
    z-index: 99;
    height: 100%;
    width: 100%;
    top: 18px;
    left: 20px;
    height: 22px;
    width: 22px;
  }
  .spinner {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    position: absolute;
    height: 3px;
    width: 100%;
    background-color: #fff;
  }
  .horizontal {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    position: relative;
    float: left;
    margin-top: 3px;
  }
  .diagonal.part-1 {
    position: relative;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    float: left;
  }
  .diagonal.part-2 {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    position: relative;
    float: left;
    margin-top: 3px;
  }
  input[type=checkbox]:checked ~ .sidebarIconToggle > .horizontal {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    opacity: 0;
  }
  input[type=checkbox]:checked ~ .sidebarIconToggle > .diagonal.part-1 {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    -webkit-transform: rotate(135deg);
            transform: rotate(135deg);
    margin-top: 8px;
  }
  input[type=checkbox]:checked ~ .sidebarIconToggle > .diagonal.part-2 {
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    -webkit-transform: rotate(-135deg);
            transform: rotate(-135deg);
    margin-top: -9px;
  }
}

* {
  margin: 0;
  padding: 0;
  font-weight: 100;
}

body {
  background-color: black;
}

/*# sourceMappingURL=main.css.map */