We noticed that the automatic scrolling issue in GTree (O11) happens when a dropdown is placed inside the tree nodes. This is caused by the dropdown’s focus event forcing the page to scroll the element into view, which makes the tree jump back up.

✅ A simple fix is to override the dropdown’s scroll behavior in CSS/JS. For example, add this CSS to prevent the browser from auto-scrolling when the dropdown opens:

.select2-container--open {  scroll-behavior: auto !important;}

Or, if you’re using a native OutSystems dropdown, you can handle it in JavaScript by preventing the scrollIntoView behavior:

document.querySelectorAll("select").forEach(el => {  el.addEventListener("focus", e => {    e.stopPropagation();  });});

This way, expanding the dropdown won’t force the tree to scroll up, and you can still expand/collapse nodes normally.

This can happen when GTree is combined with UI elements such as Dropdowns or Popups inside scrollable containers in OutSystems Reactive applications. 

If above solution hasn't worked for you, can you share: 

• Whether the dropdown is inside a GTree node template, or a separate block beside the tree. 
• And whether it’s an Outsystems Dropdown or custom HTML/Forge component.