First selected inventory slot is not highlighted when opening an inventory with a controller

Summary:

When opening an inventory (Player inventory or a block GUI) while using a controller, the first slot selected by the controller cursor is not highlighted. If an item is present in that slot, its tooltip also does not appear.

The highlight and tooltip only appear after the cursor is moved to another slot.

This behavior occurs in 26.10.21 Preview and does not occur in 26.3.

Steps to Reproduce:

1. Launch Minecraft Preview.

2. Connect a controller to the device.

3. Open a world.

4. Open the Player inventory (or another inventory GUI).

Observed Results:

The first slot selected by the controller cursor is not highlighted, and the tooltip is not displayed if the slot contains an item. Moving the cursor to another slot restores the expected behavior.

Expected Results:

The first selected slot should be highlighted immediately, and the item tooltip should appear if the slot contains an item, matching the behavior in 26.3.