FoF Night Mode blocks CSS from Wordpress Flarum comments embeded Iframe

[hrvoje-hr]

Bug Report

Current Behavior
When FoF Night Mode is enabled, it causes issues to CSS from Flarum Wordpress Integration embeds comments iframe. Custom CSS from that extension doesn't work anymore.

When FoF Night Mode is disabled, CSS from Flarum Wordpress Integration works as expected

Expected Behavior
Custom CSS from Flarum Wordpress Integration shouldn't cause issues with embedded iframes.

Screenshots
With FoF Night mode disabled (and custom CSS from extension applied)
https://imgur.com/l6veiGU

With FoF Night mode enabled:
https://imgur.com/vmbWIoE

Environment

• Flarum version: 1.6
• Extension version: 1.5.1
• Website URL: doesn't apply, FoF Night Mode is disabled in the production because of this server
• Webserver: [e.g. apache, nginx]
• Hosting environment: VPS
• PHP version: 7.4.30
• Browser: All browsers

Flarum core 1.6.2
PHP version: 7.4.30
MySQL version: 5.5.5-10.4.20-MariaDB-1:10.4.20+maria~buster-log
Loaded extensions: Core, date, libxml, openssl, pcre, zlib, filter, hash, pcntl, Reflection, SPL, session, standard, sodium, mysqlnd, PDO, xml, apcu, bcmath, bz2, calendar, ctype, curl, dba, dom, enchant, mbstring, FFI, fileinfo, ftp, gd, gettext, gmp, iconv, igbinary, imagick, imap, intl, json, exif, mongodb, msgpack, mysqli, odbc, pdo_dblib, PDO_Firebird, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, pgsql, apc, posix, readline, redis, shmop, SimpleXML, soap, sockets, sqlite3, sysvmsg, sysvsem, sysvshm, tidy, tokenizer, xmlreader, xmlrpc, xmlwriter, xsl, zip, Phar, memcached, ionCube Loader, Zend OPcache
+-------------------------------+---------+--------+
| Flarum Extensions             |         |        |
+-------------------------------+---------+--------+
| ID                            | Version | Commit |
+-------------------------------+---------+--------+
| flarum-flags                  | v1.6.1  |        |
| flarum-approval               | v1.6.1  |        |
| flarum-tags                   | v1.6.1  |        |
| flarum-suspend                | v1.6.1  |        |
| askvortsov-auto-moderator     | v0.1.2  |        |
| flarum-markdown               | v1.6.1  |        |
| flarum-lock                   | v1.6.1  |        |
| flarum-subscriptions          | v1.6.1  |        |
| fof-byobu                     | 1.1.7   |        |
| flarum-likes                  | v1.6.1  |        |
| zerosonesfun-member           | 1.2     |        |
| zerosonesfun-direct-links     | 3.1     |        |
| v17development-user-badges    | v1.1.0  |        |
| v17development-seo            | v1.8.0  |        |
| therealsujitk-gifs            | v4.1.1  |        |
| the-turk-flamoji              | 1.0.4   |        |
| sycho-profile-cover           | v1.3.3  |        |
| sycho-move-posts              | v0.1.7  |        |
| nearata-remove-pane           | v2.0.1  |        |
| nearata-cakeday               | v2.1.0  |        |
| matteocontrini-imgur-upload   | v3.9.1  |        |
| kilowhat-wordpress            | 1.7.5   |        |
| ianm-syndication              | 1.2.2   |        |
| fof-webhooks                  | 1.1.1   |        |
| fof-user-bio                  | 1.1.1   |        |
| fof-socialprofile             | 1.1.4   |        |
| fof-sitemap                   | 1.0.3   |        |
| fof-reactions                 | 1.1.3   |        |
| fof-profile-image-crop        | 1.1.0   |        |
| fof-pretty-mail               | 1.1.1   |        |
| fof-polls                     | 1.3.0   |        |
| fof-merge-discussions         | 1.3.1   |        |
| fof-links                     | 1.1.2   |        |
| fof-linguist                  | 1.0.4   |        |
| fof-ignore-users              | 1.1.0   |        |
| fof-gamification              | 1.6.2   |        |
| fof-formatting                | 1.0.2   |        |
| fof-follow-tags               | 1.1.7   |        |
| fof-drafts                    | 1.2.0   |        |
| fof-bbcode-details            | 1.1.0   |        |
| flarum-sticky                 | v1.6.1  |        |
| flarum-statistics             | v1.6.1  |        |
| flarum-pusher                 | v1.6.1  |        |
| flarum-mentions               | v1.6.1  |        |
| flarum-lang-english           | v1.6.0  |        |
| flarum-emoji                  | v1.6.1  |        |
| flarum-bbcode                 | v1.6.0  |        |
| ecnu-im-sticky-sidenav        | v1.1.0  |        |
| davwheat-inline-group-badges  | 1.0.0   |        |
| datlechin-silent-edit         | v0.1.0  |        |
| datitisev-post-galleries      | 1.0.0   |        |
| darkle-fancybox               | 1.1.2   |        |
| clarkwinkelmann-author-change | 1.0.3   |        |
| askvortsov-rich-text          | v2.1.7  |        |
| askvortsov-pwa                | v3.1.3  |        |
| askvortsov-moderator-warnings | v0.6.1  |        |
| antoinefr-money               | v1.2.0  |        |
| acpl-mobile-tab               | 1.1.1   |        |
+-------------------------------+---------+--------+

Installation path: /home/568307.cloudwaysapps.com/wnpfpfdkcz/public_html/flarum
Queue driver: sync
Session driver: file
Mail driver: smtp
Debug mode: off

Additional Context
Previously, on FoF Night Mode 1.2.2 with Flarum 1.3 everything worked great.