Redmine

In my Redmine I have multiple trackers, multiple roles and crossed permissions: let's say "developer" user can create issues with "bugfix" tracker and "salesman" user can create issues with "request" tracker but not viceversa.

Then, if "developer" user tries to create a subtask on a "request" issue, the following view is kind of broken, not displaying tracker selection at all and reporting some "random" fields. By clicking on Create at the bottom, the page returns an error but magically heals itself, showing the correct expected view expected! Obviously, the same error is achievable also if "salesman" user tries to create a subtask under "bugfix" issue...

I think users should not be forced to have "create issue" permissions on a specific issue tracker if they only have to create subtask (with different trackers, naturally: the ones they're in charge of) on it. And it looks like it's not only my thought, since forcing the subtask creation when the view is broken leads to the expected page!

Anyone experienced this? I looked for some information on it but I didn't find anything...

My Redmine installation comes from Bitnami stack 2.4.2-0, containing:
- Redmine 2.4.2
- Apache 2.4.7
- ImageMagick 6.7.5
- MySQL 5.5.34
- Subversion 1.8.4
- Git 1.8.3
- Ruby 1.9.3-p484
- Rails 3.2.16
- RubyGems 1.8.12

and plugins:
- extended fields 0.2.2
- projects table plugin 0.0.4
- DMSF 1.4.7 devel
- Redmine Multi Column Custom Fields plugin 0.0.1
- Redmine Tracker Control plugin 1.0.8