Access group checked through a page/post file upload feature doesn't work

Hi there.

I have the latest version of the plugin(1.2.2) and WordPress (3.5.1) installed.

When I upload a file through the “Add Media” button from WordPress, it uploads the file normally but when I try to set a group for this file and “Insert into page”, on Firefox it “transfers” the group(s) selected to the page currently being edited and doesn’t save the permissions intended to the file. On Google Chrome, it doesn’t save the permission as well but at least it doesn’t “transfer” the permissions set to the file.

I’ve experienced this on 2 different instances (one installed locally and another completely different website on the server, although same versions as mentioned above).

Any clue?

Thanks
Humberto

https://www.ads-software.com/extend/plugins/user-access-manager/