Issue Summary

Editor cursor jumps back to the top of the line when performing Japanese language conversion

Steps to Reproduce

It depends on the OS environment.
Windows OS with ATOK(IME)

1. install ATOK (https://atok.com/)
2. open browser
3. create confluence page(new editor)
4. input "Japanese" and perform Japanese language conversion
5. cursor back to the top of line.
6. If enter a word first, and input after a word, it works fine.(cursor doesn't back to the top of the line)

OS platform: Windows 10 Pro & Windows 10 Enterprise
Browser : Chrome(64bit 114.0.5735.110, 114.0.5735.119(Official Buil)), Firefox(114.0.1 64bit, 133.0.2)
IME: ATOK (version 33.0.4)

Linux

1. OS > Language support > install 日本語(Japanese)
2. OS setting > Keyboard > add "Japanese(Mozc)"
3. open browser
4. create confluence page(new editor)
5. input "Japanese" and perform Japanese language conversion
6. if enter [space] key, conversion is done.(can't select)
7. cursor back to the top of the line.
8. If enter a word first, and input after a word, it works fine. (cursor doesn't back to the top of the line)

OS platform: Ubuntu 20.04, Ubuntu 22.04 LTS, Ubuntu 22.04.2 LTS, Ubuntu 20.04.6 LTS
Browser: Chrome, Firefox
IME: Japanese(IBus - Mozc)

Mac OS
Even if a user were to add ATOK, it would work fine.

Expected Results

cursor does not back to the top of the line, and select conversion from list.

Actual Results

cursor back to the top of the line. And if it's ATOK, unnecessary comments are also entered.

Workaround

Windows OS
If a user uses Microsoft IME(OS default IME), it works fine .

Linux OS
Currently there is no known workaround for this behavior. A workaround will be added here when available

If a user can use legacy editor, in legacy editor it works fine.