Redmine

Hello,

I've upgraded our Redmine from 3.0.7 to 3.3.1 with svn switch.
After that I ran:
- bundle update
- bundle exec rake db:migrate
- bundle exec rake redmine:plugins:migrate
- bundle exec rake tmp:cache:clear tmp:sessions:clear

The Redmine is working seemsly, but the custom fields gets displayed as plain text instead of the usual formatting.
I've attached a prepared screenshot onwhich I bordered all fields displayed wrong.

As I see, almost all custom field displayed wrongly, but I don't see why.
The production log doesn't contain error messages.

Some background info:
- OS: debian 8
- DB: postgres 8.3.14
- WebServer: Apache 2.4.10-10+deb8u7
- Passenger: 1:5.0.30-1~jessie1

About your application's environment
Rails version 4.2.7.1
Ruby version 2.2.1-p85 (x86_64-linux)
RubyGems version 2.4.6
Rack version 1.6.4
Middleware Rack::Sendfile, ActionDispatch::Static, #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0x00000005e26710>, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp, ActionDispatch::Callbacks, ActiveRecord::ConnectionAdapters::ConnectionManagement, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, ActionDispatch::XmlParamsParser, Rack::Head, Rack::ConditionalGet, Rack::ETag, Rack::ContentLength, RequestStore::Middleware, OpenIdAuthentication
Application root /path/to/redmine
Environment production
Database adapter postgresql
Database schema version 20160529063352

Ruby is installed with rvm.

I checked it with all plugins disabled -> nothing changed.

Any ideas why the custom fields get displayed wrongly?

Cheers,
Gwyll