Reproduced in 26.1-snapshot-9.
The pre-edit window, and also, the candidate popup below appears where I last typed text. In the video, it appears on the chat screen.
It have been fixed in 26.1-snapshot-8, though the article didn’t mention.
I tested in pre2, and it still exists.
Can confirm in 25w45a.
This is still happening with and without the texture pack on.
Can confirm in 26.1-snapshot-11.
IME: Microsoft Pinyin IME. I also tried Microsoft Japanese IME, and it’s affected as well.
RAM: 32GB.
CPU: AMD Ryzen 9 8940HX.
GPU: NVIDIA GeForce RTX 5060 Laptop.