Inconsistent Behaviour of Block Editor while Adding/Searching for Blocks

I checked it and no inconsistent behaviour found.

Replying to sukanta7660:

I checked it and no inconsistent behaviour found.

@sukanta7660
Have you tested with php version 7.4
I have checked it, and it is still fizzy when searching in block editor

@dhruval04 i also checked with php version 7.4 then no issue found. But Now I noticed that issue but rarely. I am trying to recreate this.

Another reference of inconsistent behaviour of editor while searching. When I scroll to the end of page and try to add new block & search it jump its position. But if I slight moved it up its remain at same.

Version 6.3
PHP Version 7.4

​https://www.awesomescreenshot.com/video/20155324?key=3cfbcdbf8ad1fba3ad403acbdbfcdcd4

@sukanta7660 for your reference as well.

Reproduction Report

Description

This report validates whether the issue can be reproduced.

Environment

• WordPress: 6.9
• PHP: 8.3.30
• Server: PHP.wasm
• Database: WP_SQLite_Driver (Server: 8.0.38 / Client: 3.51.0)
• Browser: Chrome 144.0.0.0
• OS: Linux
• Theme: Twenty Twenty-Five 1.4
• MU Plugins: None activated
• Plugins:
  • Kadence Blocks – Gutenberg Blocks for Page Builder Features 3.5.32
  • Test Reports 1.2.1

Steps to Reproduce

1. Create or edit a page, go to Pages → Add New (or edit an existing page)
2. Add multiple blocks so the page becomes long enough to scroll.
3. Scroll to the bottom.
4. Open the Block Inserter, through the "+" button in the top bar or next to the block.
5. Search for a custom block. In the inserter search field, type the name of a custom block.
6. Observe the behavior.

Actual Results

1. ❌ Error condition occurs (reproduced).

Additional Notes

• Used the Kadance plugin to add custom blocks.

Supplemental Artifacts

Screencast:
While using the "+" in the block:
​https://files.catbox.moe/8hoghw.webm

While using the "+" at the top bar:
​https://files.catbox.moe/ed2mzf.webm