jquery ui sortable - problem with triggering target - jquery-ui

Question

I am using jquery-3.4.1.min.js and jquery-ui-1.12.1 .
I have a problem with jquery ui sortable widget.
When I try to drag "div.container", which is child of "div.containerList" (with applied sortable), I am not able to trigger dom change on whole height of sibling element, I have to adjust dragged element vertical position.
Can somebody please explain this behavior, possibly with solution?
Thank you very much!
https://jsfiddle.net/chada090/47ku2jer/
A added some modificaton to make it more "contrast" for each element.
HTML
<div class="containerList">
<div class="container"><span class="title">test kontejner</span>
<div class="addTask">
<div class="switch">Přidat úkol</div>
</div>
<div class="taskList"></div>
</div>
<div class="container">
<span class="title">test kontejner1</span>
<div class="addTask">
<div class="switch">Přidat úkol</div>
</div>
<div class="taskList"></div>
</div>
<div class="container placeholder"><span class="title_newCont">Nový kontejner</span></div>
</div>
JS
$(".containerList").sortable({
// containment: "parent",
placeholder: "ui-state-highlight container",
change: function( event, ui ) {
console.log(ui);
}
}).disableSelection();
CSS
.containerList{
display: flex;
min-height: 600px;
}
.containerList .container{
display:inline;
margin-left: 15px;
margin-right: 15px;
flex: 0 0 300px;
min-height: 150px;
width: 300px;
display:flex;
flex-direction: column;
background: gray;
padding: 20px;
}
.container .title_newCont{
cursor: pointer;
color: blue;
}
.container .addTask{
margin-top: 10px;
margin-bottom: 10px;
background-color: white;
box-shadow: 0px 3.2px 7.2px 0px rgba(0, 0, 0, 0.18), 0px 0.6px 1.8px 0px rgba(0, 0, 0, 0.11);
min-height: 20px;
display: flex;
flex-direction: column;
align-items: center;
padding: 5px;
}
.container .taskList{
margin-top: 20px;
background: brown;
height: 20px;
}
.taskList > div{
background-color: white;
margin-top: 15px;
}
.taskList .taskItem{
margin-bottom: 10px;
background-color: white;
box-shadow: 0px 3.2px 7.2px 0px rgba(0, 0, 0, 0.18), 0px 0.6px 1.8px 0px rgba(0, 0, 0, 0.11);
min-height: 40px;
display:flex;
align-items: center;
padding: 5px;
background: blue;
}
.taskNewItem > *{
padding: 3px;
background: green;
}
.taskNewItem input{
border: none;
outline: none;
background: red;
}
.addTask .switch{
text-align: center;
width: 100%;
background: yellow;
}
.taskNewItem{
display: flex;
flex-direction: column;
}
.taskNewItem input{
width: 100%;
}
.taskNewItem .taskButtonAdd{
width: 100%;
background-color: green;
flex:0 0 40px;
font-size: 15px;
border: none;
}
.ui-state-highlight{
background-color:blue !important;
}

Answer 1

after reading through API documentation, I found option "tolerance", which solved my problem.
tolerance Type: String Default: "intersect" Specifies which mode to
use for testing whether the item being moved is hovering over another
item. Possible values: "intersect": The item overlaps the other item
by at least 50%. "pointer": The mouse pointer overlaps the other item.
Code examples: Initialize the sortable with the tolerance option
specified:
1 2 3 $( ".selector" ).sortable({ tolerance: "pointer" });