Redmine

I have two long text fields (description and the other one is custom field) which are displayed correctly in 1 of my 3 projects. In the other 2 projects they are missing unless I uncheck the option for using full width layout, then they would show up. They stay editable in all situations. I checked already the tracker and visibility settings (visible for all users).

System information:

Environment:
Redmine version 4.1.1.stable
Ruby version 2.6.6-p146 (2020-03-31) [x86_64-linux]
Rails version 5.2.4.2
Environment production
Database adapter PostgreSQL
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp
SCM:
Subversion 1.10.4
Mercurial 4.8.2
Bazaar 2.8.0
Git 2.20.1
Filesystem
Redmine plugins:
issue_mail_with_attachments 0.9.0
mega_calendar 1.7.3
redmine_ckeditor 1.2.3
redmine_custom_auto_complete 0.0.1
redmine_local_avatars 1.0.5.2.0
sidebar_hide 0.0.8