Last Updated: 17 Sep 2021 07:23 by ADMIN
Created on: 16 Sep 2021 03:46
Category: Grid
Type: Bug Report
Group DateTime field issue related to Group paging and virtual scrolling for local data in Kendo grid

Hi All,

We are facing a weird issue in kendo grid when both group paging and virtual scrolling are enabled for local data. Please see https://dojo.telerik.com/ICoDAleN/2 as example.

Steps to reproduce:

1. Run the code from https://dojo.telerik.com/ICoDAleN/2.

2. Try to group "DateTime" column by drag and drop to grouping header

3. After "DateTime" column is grouped, then un-group it by click cross icon of DateTime button.

4. Now you try to scroll down the grid, until ID column reach around 40, you will see the ID will jump back to around 0, and you will never see the rows which IDs are greater than 40.

5. If you open Developer Tools of browser, you will see following errors.

Uncaught ReferenceError: DateTimeDisplayValue is not defined
    at eval (eval at compile (kendo.all.js:234), <anonymous>:3:1078)
    at init._rowsHtml (kendo.all.js:71887)
    at init._renderContent (kendo.all.js:72745)
    at init.refresh (kendo.all.js:72565)
    at init.d (jquery.min.js:2)
    at init.trigger (kendo.all.js:164)
    at init._process (kendo.all.js:8113)
    at init._processRangeData (kendo.all.js:9026)
    at init.range (kendo.all.js:8857)
    at init._page (kendo.all.js:64643)


6. If you group other columns, for example, group "Subject" column, and then un-group it, then scroll down the grid, you will not see this issue.


How to fix it? is there any workaround?





Georgi Denchev
Posted on: 17 Sep 2021 07:23

Hello, David,

The status of this thread will change to "Completed" once the bug has been fixed. Additionally you can track the GitHub issue in our Public repository for progress:


I've assigned a high priority to the issue, so it will be looked at sooner compared to other smaller bugs, however I cannot provide you with an exact date for the fix at this time.

Best Regards,
Georgi Denchev
Progress Telerik

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Posted on: 16 Sep 2021 16:20

Thanks, Georgi. It is fine to convert this ticket into a Public Bug Report.

BTW, how can i track if this issue is fixed because it is important for us?




Georgi Denchev
Posted on: 16 Sep 2021 12:15

Hello, David,

Thank you for all of the provided details!

I contacted the Dev team and they confirmed that this is indeed a bug. I have updated your Telerik Points as a sign of gratitude for reporting this behavior.

Unfortunately I cannot provide you with any workarounds at this time, you would have to turn off either the Group Paging, or the Virtual Scrolling.

I apologize about the caused inconvenience.

May I ask you if it is okay to convert this ticket into a Public Bug Report that will be visible in our Feedback Portal? If not, would you like to open a separate Bug Report, or would you like me to open one in your name?

Best Regards,
Georgi Denchev
Progress Telerik

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