Does that limiter have true peak detection? If so, you should switch that on - and even then, it’s better to stay away from 0 dB. Especially if you want to encode the audio later (to mp3 for instance) you’ll need extra headroom because the peaks will change from it. Personally, I now use -1 dB True Peak, but SoundCloud even recommends -2 dB TP for uploaded music!