When I use the export project function then zrythm warns me that the audio file is peaking over 0dB. However, there is a limiter set to -1dB true peak on the master channel and the master loudness meter shows me -1 dB max. peak. Checking the exported file externally shows that it really is much louder, up to 20 dB more than expected.

If I route everything through a "preMaster" channel with a limiter on it and export the mixdown it is the same result, the file is too loud,