[Bug]: "Editing session has expired. Please reload the page." on public share links with readme.md

### ⚠️ This issue respects the following points: ⚠️

- [X] This is a **bug**, not a question or a configuration/webserver/proxy issue.
- [X] This issue is **not** already reported on [Github](https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3Abug) OR [Nextcloud Community Forum](https://help.nextcloud.com/) _(I've searched it)_.
- [X] Nextcloud Server **is** up to date. See [Maintenance and Release Schedule](https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule) for supported versions.
- [X] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/).

### Bug description

When accessing folders with "readme.md" files through public shares, an error "Editing session has expired. Please reload the page." will popup periodically.
Checking inside of Developer Tools -> Network, periodic calls to "/apps/text/public/session/2012934/push" and "/apps/text/public/session/2012934/sync" are executed.
Call to sync returns a bunch of "steps" and "sessions", while call to push only had the "Editing session has expired" message.

This does not happen when you are logged in.

### Steps to reproduce

1. Create a folder, write anything in readme.md
2. Share via shared link
3. Open the shared link in a private window or anything that invalidates your nextcloud session


### Expected behavior

You are able to see and scroll the readme.md file.

### Installation method

Community Web installer on a VPS or web space

### Nextcloud Server version

29

### Operating system

Debian/Ubuntu

### PHP engine version

PHP 8.3

### Web server

Nginx

### Database engine version

PostgreSQL

### Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 22 to 23)

### Are you using the Nextcloud Server Encryption module?

None

### What user-backends are you using?

- [X] Default user-backend _(database)_
- [ ] LDAP/ Active Directory
- [ ] SSO - SAML
- [X] Other

### Configuration report

```shell
{
    "system": {
        "debug": false,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "redacted",
            "192.168.20.12"
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 1.5,
            "dbindex": 0
        },
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "29.0.0.19",
        "overwrite.cli.url": "https:\/\/redacted",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtpauthtype": "PLAIN",
        "mail_smtpsecure": "ssl",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "enable_previews": true,
        "updater.release.channel": "stable",
        "default_phone_region": "it",
        "loglevel": 2,
        "maintenance_window_start": 1
    }
}
```


### List of activated Apps

```shell
Enabled:
  - activity: 2.21.1
  - auto_groups: 1.5.3
  - bruteforcesettings: 2.9.0
  - circles: 29.0.0-dev
  - cloud_federation_api: 1.12.0
  - collectives: 2.10.1
  - comments: 1.19.0
  - contacts: 6.0.0
  - contactsinteraction: 1.10.0
  - dashboard: 7.9.0
  - dav: 1.30.1
  - external: 5.4.0
  - federatedfilesharing: 1.19.0
  - files: 2.1.0
  - files_accesscontrol: 1.19.1
  - files_automatedtagging: 1.19.0
  - files_downloadlimit: 2.0.0
  - files_external: 1.21.0
  - files_reminders: 1.2.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - files_versions: 1.22.0
  - forms: 4.2.3
  - group_everyone: 0.1.15
  - groupfolders: 17.0.0-beta.1
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - notifications: 2.17.0
  - oauth2: 1.17.0
  - password_policy: 1.19.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - recommendations: 2.1.0
  - related_resources: 1.4.0
  - settings: 1.12.0
  - sociallogin: 5.6.4
  - spreed: 19.0.0
  - systemtags: 1.19.0
  - text: 3.10.0
  - theming: 2.4.0
  - twofactor_backupcodes: 1.18.0
  - updatenotification: 1.19.1
  - user_status: 1.9.0
  - viewer: 2.3.0
  - weather_status: 1.9.0
```


### Nextcloud Signing status

```shell
No errors have been found.
```


### Nextcloud Logs

```shell
Log is empty.
```


### Additional info

I have backported a "group folders" app for NC29 until they release a proper one, but the issue also happens if that app is disabled.

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[Bug]: "Editing session has expired. Please reload the page." on public share links with readme.md #5800

edocod1
openedon May 15, 2024

⚠️ This issue respects the following points: ⚠️

Bug description

Steps to reproduce

Expected behavior

Installation method

Nextcloud Server version

Operating system

PHP engine version

Web server

Database engine version

Is this bug present after an update or on a fresh install?

Are you using the Nextcloud Server Encryption module?

What user-backends are you using?

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

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