[Bug]: Blazorise TreeView control shows duplicate entries

[JosephFicara]

Blazorise Version

1.3.3, 1.3.4 and 1.4

What Blazorise provider are you running on?

Bootstrap5

Link to minimal reproduction, or a simple code snippet

Steps to reproduce

1. To enable dynamic loading HasChildNodes="@(item => true)"
2. Utilize the GetChildNodesAsync="@(async item => await GetChildNodes(item))" to populate the child nodes
3. Add a child node to a tree node that currently has no child nodes
4. Observe that the UI shows duplicate child nodes
5. Collapse and reopen the child node
6. Observe that the single child node is properly reflected

What is expected?

Only the single node that was added should be shown.

What is actually happening?

Duplicate child nodes are shown

What browsers are you seeing the problem on?

Chrome, Microsoft Edge

Any additional comments?

This only happens when a parent node has no children. If the parent node initially has children, then duplicate nodes are not shown
The backing data store does not get duplicate nodes, its only something that is happening in the tree. When you collapse and expand the parent node the proper children are represented.

[github-actions]

Hello @JosephFicara, thank you for your submission. The issue was labeled "Status: Repro Missing", as you have not provided a way to reproduce the issue quickly. Most problems already solve themselves when isolated, but we would like you to provide us with a reproducible code to make it easier to investigate a possible bug.

[David-Moreira]

@JosephFicara I am sorry but please provide a repository with the reproduceable, there might be very specific things that you are doing in the code that we can't tell... or have to be guessing in order to try and reproduce ourselves.

[JosephFicara]

Hi @David-Moreira, @stsrki

I added a simplified example in this repo: https://github.com/JosephFicara/blazorisebugs.git

You will find it in the TreeControlTestAppBlazoirizeSolution

Let me know if you have any questions.

Thank you for your help and support.

[David-Moreira]

Hello,
It's indeed a bug where our internals are causing the duplication with the usage of ObservableCollection.

We'll be fixing the issue as soon as possible.

PS: Really appreciated for the good repro, it really helps us alot.

[JosephFicara]

Thank you @David-Moreira