Hear original audio in interpretation channel

[mrwennnnny]

We are running a webinar in Italian with English consecutive interpretation in the main channel and have 6 other language interpretation channels. We require the Italian voice to be audible in the interpretation channels but the current configuration we are not able do so even with the original audio unmuted, as there is a 5-8 seconds delay after the interpreter finishes speaking. Has anyone encounter the same problem and found a solution? Thanks