Let me start saying: Thanks for such an amazing tool, I love Moodle.
I have a separate user for administrative functions and another for the teacher roles in courses of a very small Moodle implementation I use personally. When posting announcements, the administrative user can set display period options (even editing the other user's posts) while the teacher user can post new discussions without display period since the section is completely missing when using the advanced option as shown below:
According to this, I should provide mod/forum:viewhiddentimedposts to the user to be able to set display period to a post, which both users have. I show here the user that is not able to set the display periods, collapsed for ease of visualization:
Any ideas and what else should be checked here?
Many thanks in advance.