When confirming Kanji conversion in Japanese input, characters disappear

[mt8]

Description

Enter Japanese into the paragraph block/heading block, etc., and confirm the kanji conversion.

Step-by-step reproduction instructions

• Open the post page.
• Enter Japanese into a paragraph block and convert it to Kanji.
• Confirm the conversion with the ENTER key

Press the space key or enter key during conversion to reproduce

Screenshots, screen recording, code snippet

2024-09-26.20.28.23.mov

Environment info

WordPress: 6.6.2 (Japanese)
Gutenberg Plugin: 19.3 (Japanese)

macOS Sonoma
Chome (129)

This problem is theme independent.

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

[torounit]

I could reproduce the same problem.

This problem seems to have occurred since 19.2.0

Chrome 129 / mac OS 14.6.1

2024-09-26.20.29.43.mov

This did not occur in firefox 131.

[mt8]

Reproduced with Microsoft Edge (129) installed on Mac

[torounit]

ping: @t-hamano @mirka

[t-hamano]

Thanks for the report.

I tested on Windows OS and was not able to reproduce the issue.

• Tested Gutenberg versions:
  • Gutenberg version 19.3: https://playground.wordpress.net/?plugin=gutenberg
  • Gutenberg trunk (5df9613)
• Browser:
  • Chrome 129.0.6668.71
  • Firefox 130.0.1
  • Edge 129.0.2792.52

This might be an OS-specific issue, but I cannot test on MacOS in my environment.

I'd be grateful if someone who can reproduce this issue could use git bisect or similar to identify which commit caused the problem.

[mt8]

Additional information.
It didn't reproduce in 19.1, but it did in 19.2.

[mt8]

Looks like this revert PR fixes it.
#65414

I also confirmed that the problem does not occur on the trunk/6.7 branch.

[Mamaduka]

Thanks for confirmation, @mt8!

I was about to suggest testing that revert commit, but I'll close the issue now that it's fixed.

[mt8]

Did not reproduce in 19.4.0 RC1