When assigning a internet rule to a group the before associated rule is not prefilled in the "Assign internet rule" dialog. It is always "--- default settings ---" prefilled.
*** Bug 27287 has been marked as a duplicate of this bug. ***
This issue has been filled against UCS@school 3.2. The maintenance with bug and security fixes for UCS@school 3.2 has ended on Dec 31, 2016. Customers still on UCS 3.x are encouraged to update to UCS 4.3 (or later). Please contact your partner or Univention for any questions. If this issue still occurs in newer UCS versions, please use "Clone this bug" or simply reopen the issue. In this case please provide detailed information on how this issue is affecting you.