Use Previews not working in Premiere Pro 2021 (15.2)
The "Use previews" option in Premiere Pro 2021 (v15.2) on MacOS doesn't work in all cases. It seems to work when exporting in the same codec as the timeline, however, if I export a rendered ProRes timeline with loads of effects in MP4, Premiere don't use the previews to convert to MP4, instead it all re-renders the effects to export to MP4. Very annoying and it wasn't the case in Premiere 2020
Cameron Smith commented
I'm experiencing this too along with several other bugs introduced in v15. Very frustrating.