Preselect values not working with Virtualized, Remote Data MultiSelect

[Hunter Malley]

There appears to be an issue preselecting values in a MultiSelect component when virtualization is enabled and using remote data. When specifying options to be preselected via the MultiSelect.values property, after rendering, the component does not display the specified placeholder. If you select another value from the component you will see '[Manually selected value], undefined' (i.e. '1002, undefined').

The issue can be recreated using the stackblitz linked on the following example from the documentation: https://ej2.syncfusion.com/javascript/documentation/multi-select/virtual-scroll#binding-remote-data

Just add the following line to the component initialization: 'value: [1001],'

Any assistance would be appreciated.

Best,

Hunter

[Hunter Malley]

Hello,

I am just following up on this issue. Any updates would be appreciated.

Thank you,

Hunter

[Mallesh Ravi Chandran]

We have considered the reported issue "  MultiSelect displays "undefined" when virtualization is enabled along with custom preselected values " as a bug from our end and the fix for the issue will be included in our upcoming weekly patch release, which is expected to be rolled out in  end of May , 2026 .

Will share the feedback details in following update ,

Disclaimer: “Inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization.”

[Mallesh Ravi Chandran]

As per our previous update, we have identified the reported issue — “MultiSelect displays ‘undefined’ when virtualization is enabled along with custom preselected values” — as a bug on our end.

We are currently working on a fix, which will be included in our upcoming weekly patch release, expected to be rolled out by the end of May 2026.

For more details, please refer to the feedback item below:
🔗 https://www.syncfusion.com/feedback/73986/multiselect-displays-undefined-when-virtualization-is-enabled-along-with-custom

[UdhayaKumar Duraisamy]

The issue "MultiSelect displays 'undefined' when virtualization is enabled along with custom preselected values" has been fixed in version 33.2.7.

Release Notes: MultiSelect — v33.2.7

Root cause: The AllowCustomValue was not handled properly in the virtualization scenario.