Description

Whatever I decide to edit, I instantly get the disconnected alert.

wp-json/wp-sync/v1/updates?_locale=user

Request
{"rooms":[{"after":-2062052375,"awareness":{},"client_id":3501643318,"room":"postType/post:16604","updates":[]},{"after":0,"awareness":{},"client_id":192830941,"room":"root/comment","updates":[]},{"after":0,"awareness":{},"client_id":1032101480,"room":"postType/page:9","updates":[]},{"after":0,"awareness":{},"client_id":636571365,"room":"taxonomy/wp_pattern_category","updates":[]},{"after":0,"awareness":{},"client_id":2456077383,"room":"taxonomy/category","updates":[]}]}

Response
{"code":"rest_invalid_param","message":"Invalid parameter(s): rooms","data":{"status":400,"params":{"rooms":"rooms[0][after] must be greater than or equal to 0"},"details":{"rooms":{"code":"rest_out_of_bounds","message":"rooms[0][after] must be greater than or equal to 0","data":null}}}}

Step-by-step reproduction instructions

1. Open editor
2. Get "disconnected" alert

Screenshots, screen recording, code snippet

No response

Environment info

### wp-core ###

version: 7.0-beta1-61714
site_language: en_US
user_language: en_US
timezone: Europe/Helsinki
permalink: /%postname%/
https_status: true
multisite: false
user_registration: 0
blog_public: 1
default_comment_status: open
environment_type: production
user_count: 1
dotorg_communication: true

### wp-dropins (1) ###

advanced-cache.php: true

### wp-parent-theme ###

name: Twenty Nineteen (twentynineteen)
version: 3.2
author: the WordPress team
author_website: https://wordpress.org/
auto_update: Enabled

### wp-server ###

server_architecture: Linux 5.10.0-38-686-pae i686
httpd_software: Apache/2.4.66 (Debian)
php_version: 8.2.29
php_sapi: fpm-fcgi
max_input_variables: 1000
time_limit: 30
memory_limit: 128M
admin_memory_limit: 256M
max_input_time: 60
upload_max_filesize: 32M
php_post_max_size: 32M
curl_version: 7.74.0 OpenSSL/1.1.1w
suhosin: false
imagick_availability: false
opcode_cache: true
opcode_cache_memory_usage: 99023184 of 113746504
opcode_cache_interned_strings_usage: 100% of 8388608 (0 free)
opcode_cache_hit_rate: 99.99
opcode_cache_full: false
pretty_permalinks: true
htaccess_extra_rules: true
static_robotstxt_file: false
current: 2026-02-22T11:13:05+00:00
utc-time: Sunday, 22-Feb-26 11:13:05 UTC
server-time: 2026-02-22T13:13:03+02:00

Firefox 147.0b3

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

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure