Hello Matthias,

You are absolutely right. Please accept my apologies for not including this important detail in my explanation.

To remove the expand icon, it is necessary to also change the reference of the Data parameter:

                currCategory.HasChildren = false; // remove the expand icon from the node
                
                HierarchicalData = new (HierarchicalData);

Thank you for bringing this crucial detail to our attention! If you have any further questions or concerns, please feel free to reach out to us at any time.

Regards,
Yanislav
Progress Telerik

Hello,

We understand how frustrating it can be when a bug arises, and we are sorry for any inconvenience caused. In the meantime, until the issue is resolved I would like to suggest a workaround that may help you. Please review this REPL example. 

The workaround utilizes the OnExpand event. Within the event handler, you can get the node and check if it has children - if not set its "HasChildren" property to "false". Thus the icon will be removed. 

    private async Task LoadChildren(TreeViewExpandEventArgs args)
    {
...
                currCategory.HasChildren = false; // remove the expand icon from the node

===

On a side note, I would like to explain how we prioritize our development efforts. We take all reported bugs seriously and evaluate them based on their severity, impact on the user experience, and the number of customers affected. We also consider the feedback we receive from our community, which helps us to understand which issues are most important to our users.

While we strive to address all reported issues, we must prioritize our efforts based on the severity of the bug and the demand from our community. This means that some bugs may take longer to fix than others, and we appreciate your patience as we work to improve our product.

What I can recommend at this point is to follow the item to get status updates - this is the easiest way to keep track of its progress. 

Regards,
Yanislav
Progress Telerik