The second instance will process (and wasn't so minimal either in my experience) although it shouldn't, I bet this would happen with any auto-mastering site too. Then don't disable it, open another one on the same track and analyze again while the previous instance is working (same area, same settings).
Speaking of ozone I actually tried this too Use ozone's master assistant to analyze and process a track. But a ME can hear this and fix it or worst case request stems. In a mix, an analyzer can detect this (Izotope neutron, though it still lets the human to fix it) but on a stereo file this can't be seen on any sort of analyzer as it doesn't show itself as a peak. A human ME wouldn't use an EDM track as a reference for an acoustic vocal/piano track either, would he?I was actually referring to more of a masking effect. Point taken, but that's also partly the choice of a WRONG reference. Some songs I do master myself, but the ones I really want to sound good I pay someone for that. When I get a great master from them, I try to match it myself and learn a little more about mastering. I even tweeted the band asking about the service and got a response. I found them the traditional way, I looked at the credits of a vinyl record I was listening to, and saw they were listed as the mastering service. It's budget mastering for those who still want a human involved, and they're proven (to me anyways).
I use Doctor Mix, a human-based mastering service and they only charge $41 a song for mastering. If you're serious about your music and have some extra money, you shouldn't ever use an auto-mastering service. They deserve a cheaper alternative, albeit one of lesser quality.
I only would give budget hobby people full carte blanche to use auto-mastering services like Landr without a shade of ridicule. If you're making enough money and are serious about your music, you should master your own music, or pay a human to do it. I think anyone who considers themselves "pro" or "prosumer" is smart enough to realize this.