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Request a Feature Report a Bug
Unplanned
Last Updated: 08 Jun 2026 08:33 by Stefan
Stefan
Created on: 08 Jun 2026 08:33
Category: ListBox
Type: Bug Report
1
RadListBox resets scroll position to 0 upon item selection after mouse wheel scrolling

We are encountering an issue with the RadListBox control (version 2026.1.225) where the container's scroll position abruptly jumps back to 0 when an item is selected. Tested with Edge, Chrome and Firefox. This issue can be reproduced directly on the official Progress live demo page.

Steps to reproduce:
  1. Open the demo page linked above.
  2. Scroll down to the bottom of the RadListBox using only the mouse wheel.
  3. Click on any item (e.g., "USA") to select it.

Observed behavior:

Immediately upon clicking the item, the container's scroll position snaps back to 0 (the top of the list). This happens consistently across all modern browsers (Edge, Chrome, and Firefox).

Important factual details regarding the scrollbar:
  • The issue does not occur if the user clicks and drags the scrollbar thumb with the left mouse button before selecting an item.
  • The issue does not occur if the user clicks the top or bottom navigation arrows on the scrollbar container to scroll.
  • The unexpected reset to 0 only triggers when scrolling is performed exclusively via the mouse wheel prior to item selection.
Please let us know if there is an official hotfix or an updated internal build available that resolves this scrolling state synchronization issue.
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