UPDATE.
Hello there.
So far i have tested the following solutions and had either success or failure.
I will post NO/YES that refers to the glitch (sound stop).
1) Playing ONLY with the Helix itself with Headphones - NO
2) Different power supply socket and USB Connection - YES
3) Different USB socket at a USB Hub - YES
4) Connecting USB to Mac Mini straight - YES
5) Connecting Helix through XLR cables to my interface with NO USB connected to either my Mac or my USB Hub - NO
So...i think there is something wrong regarding the USB connection.I am saying that because i want to run simultaneously HX Edit to modify the patches, Logic to record and maybe some Youtube for videos.The thing is that i am using this setup for 2 years now and never had any such issues.
I will continue searching for stuff and post but i am late because this thing occurs suddenly after a while not too often so i have to play some time.
Let me hear your thoughts.
Cheers,John.