Musescore Website Reverb

I've noticed that reverb effects from the synthesizer are applied in the developer but when I listen to songs that are supposed to have reverb on the website they have no reverb effects. When I switch the audio source to the synthesizer all I get is silence. I'm wondering if there's something wrong with the website or if it's just my application of the reverb that's wrong. Can someone help me with this?
Thanks in advance.