Nested Sortable issue

[ReeceG]

Hi there,
I've run into an issue with a sortable list that contains sortable lists, a minimal example being:

<div data-controller="sortable">
    <div data-controller="sortable" class="inner-list">
        <div>item 1a</div>
        <div>item 1b</div>
    </div>
    <div data-controller="sortable" class="inner-list">
        <div>item 2a</div>
        <div>item 2b</div>
    </div>
</div>

The observed behavior is that sorting the items inside the "inner-lists" works as intended, but sorting the "inner-lists" themselves doesn't work correctly. After grabbing an "inner-list" and moving it, it gets locked into the first new position it enters, and can't be moved around any more (i.e. back to its original position) until the drag is released and a new one is initiated. Based on some additional testing, it also seems like the "end" event doesn't fire when dragging an "inner-list". Removing the controller from the "inner-list" allows the outer sortable to function again. Unfortunately there are no errors in the console so I don't have much else to help diagnose this issue, or any way to find a workaround.
Thank you!