Filter menu with checkboxes does not resize correctly when opening for the first time.

[kendo-bot]

Bug report

When using the default column checkbox filter menu and the data requested from the server takes time to load, the filter menu popup does not resize correctly when opening the menu for the first time.

The issue started to occur in version 2025.1.211.

Reproduction of the problem

1. Enable the checkbox filter menu of a specified column. The Grid binds to remote data and the data operations are perfomed on the server.

2. Open the filter menu when the Grid is loaded.

3. The Read request triggers and a loader is displayed to indicate that the data is loading:

4. The options are loaded, but the popup container does not expand as expected:

5. Close the filter menu and opend it again:

Expected/desired behavior

The filter menu popup must display all options when the data is loaded.

Workaround

<style>
     .k-animation-container-shown {
        overflow: visible !important;
    }
</style>

Environment

• **Kendo UI version: 2025.2.520
• **jQuery version: 3.7.1
• **Browser: [all]