Premiere audio acting strange

I'm using macOS Sequoia and Version 25.4.0 of Premiere and all the audio in my project is a mess and so difficult to listen to, I can't be the only one surely. All the tracks on A1 in my sequence have a really strange reverb on them. The original audio in Finder is perfect and crisp with no reverb at all.

On top of that, my music tracks in this projects sound terrible and jarring, with most of the audio (but not all) coming out of my right ear even when both channels are selected.

There is also loads of ducking happening, again, without there being any ducking enabled in Essential Sound. Where music and voiceovers tend to blend together in my edits, every time the music volume raises a bit, the voiceover goes so quiet to the point where it's almost impossible to hear anything.

I'm aware I'm probably going to be asked for screenshots, but I have no idea what to show you as there's nothing to see, everywhere I've looked there's nothing applied. There's nothing added in Essential Sound and nothing in the Audio Track mixer.