ios-scroll-bug-2.html

<div class="overlay">
    OVERLAY
    
    <div class="scroll--container">
        <div class="scroll">
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
            <a href="#" class="scroll--link">Link</a>
        </div>
    </div>
</div>

<style>
  html,
body {
    background: repeating-linear-gradient(tomato, tomato 10px, aliceblue 10px, aliceblue 20px);
    width: 100%;
    height: 200vh;
    overflow: hidden;
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    text-align: center;
    color: #fff;
    overflow: auto;
}

.scroll--container {
    margin-top: 60vh;
    margin-bottom: 60vh;
    width: 100%;
    overflow: auto;
}

.scroll--link {
    display: inline-block;
    color: magenta;
    height: 100%;
    width: 20vw;
    background: green;
}

.scroll {
    height: 100px;
    white-space: nowrap;
    background: red;
}
</style>