Audio Noise reduction does not apply on Export
I've played around with the Audio effect "noise reduction" and read some guides/the manual. I wanted to remove the background noise caused by my running PC in the background. I captured a Noise Print, played around with the Threshold/Reduction until I was satisfied with the result. The noise was mostly gone and the remaining audio was overall quieter, but still fine.
It works out well in the preview/viewer in HitFilm Express, but once I export the video (pre-made preset Youtube 720p 60pfs) the audio effect simply does not apply.
I tried both export for content, export for In and Out Point etc.
Am I missing something? Do I have to somewhere check something to actually apply the effect?