I have noticed Eos produces some constant low-level noise even when no sound is feeded into it. With just one instance the noise level seems to average somewhere around -105 dBFS, which of course is completely inaudible. In larger projects, though, with multiple instances, the noise level builds up and can easily mess up dithering and may even come audible at some point. So I recommend using noise gate with Eos.
By the way, I tried stacking 10 instances with big and long reverb settings on one channel and the noise came clearly audible. I bounced and normalized a clip, and I must say the result sounds really creepy. If there are any drone/dark ambient producers out there, you might make use of this noise leakage. ;).