Possibly related to https://github.com/telerik/blazor/issues/2594
(optional)
The first locked column (ID) is rendered after the second locked column (Product Name). When you resize a non-locked column, the ID column disappears and is revealed at its new position after you scroll the Grid horizontally.
The behavior is reproducible with RTL enabled.
The order of the locked columns should persist.
The Grid performance worsens progressively with each subsequent edit operation. Please optimize that.
Test page: https://blazorrepl.telerik.com/mJuHFNbb17FpJu9b54
Click on a Price or Quantity cell to start edit mode and tab repetitively to observe the degradation.
Telerik input components inside EditorTemplate render the whole grid on each keystroke
<AdminEdit>
As a workaround, you can use the standard Input components provided by the framework together with a CSS class that would visually make them like the Telerik Input Components. An example for the TextArea:
<InputTextArea class="k-textarea" @bind-Value="@myValue"></InputTextArea></AdminEdit>