In reply to @maximilian:transformierende-gesellschaft.org
Then I suggest we monitor this closely and set the history restriction to member-only again once the PR has been included in a synapse release. So: Everything that follows now is (even more) public. Furthermore I will make ma27 an admin so I am not the only one managing this room 🙂

synapse v1.39 will include the fix: https://github.com/matrix-org/synapse/releases/tag/v1.39.0rc1

The spaces summary API now returns any joinable rooms, not only rooms which are world-readable. (#10298, #10305)

Actually, there's an issue with translations:

Changing application language to en-us
Fetching translation json for locale: en-us
Could not fetch translation json for locale: 'en-us' Error: Cannot find module './i18n/strings/en-us.json'
Require stack:
- /nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/language-helper.js
- /nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/tray.js
- /nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/electron-main.js
- /nix/store/kjv95jyji0a6587l7ljnnpb56vlb2iha-electron-13.1.6/lib/electron/resources/default_app.asar/main.js
-
    at Module._resolveFilename (internal/modules/cjs/loader.js:887:15)
    at Function.n._resolveFilename (electron/js2c/browser_init.js:257:1128)
    at Module._load (internal/modules/cjs/loader.js:732:27)
    at Function.f._load (electron/js2c/asar_bundle.js:5:12913)
    at Module.require (internal/modules/cjs/loader.js:959:19)
    at require (internal/modules/cjs/helpers.js:88:18)
    at AppLocalization.fetchTranslationJson (/nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/language-helper.js:76:20)
    at /nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/language-helper.js:89:39
    at Array.forEach (<anonymous>)
    at AppLocalization.setAppLocale (/nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/language-helper.js:88:17) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/language-helper.js',
    '/nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/tray.js',
    '/nix/store/rfsgqqv6hxrkq7k9zqxfg2v5gnwmi4ir-element-desktop-1.7.33/share/element/electron/lib/electron-main.js',
    '/nix/store/kjv95jyji0a6587l7ljnnpb56vlb2iha-electron-13.1.6/lib/electron/resources/default_app.asar/main.js',
    undefined
  ]
}