The game does not accept input after opening the emoji panel by pressing Windows+.

When I press Win + . (the Windows key and the period key), no other keys respond, and I cannot move in the game unless I press Esc.

Issue update: In 26.2, the system input method is always used, and the emoji panel displays normally; after using the game's built-in IME in the 26.3 snapshots, the emoji panel completely fails to display, and other keys do not respond unless the Esc key is pressed.

Consensus: input method=IME

An input method (or input method editor, commonly abbreviated as IME) is an operating system component or program that enables users to generate characters not natively available on their input devices by using sequences of characters (or mouse operations) that are natively available on their input devices.