[otrs] Ticket Replies and CCs

Hello, We have recently upgraded our OTRS installation from version 2.4, to version 3.2. One issue that we have come across which is kind of urgent, is that when crafting a reply, it only replies to the original sender, not anyone in the CC or BCC fields. This unfortunately causes many headaches with keeping people in the loop on the progress of an issue. Has anyone experienced this? Or is there some setting to change? Thanks in advance.