My distribution (mageia) upgrade came with version 1.2.0 of hydrogen and (apparently) a new bug when exporting to a wave file: it adds a dead time (several measures) so the wave file is not anymore the song i can hear in hydrogen! For instance it is twice longer than it should in the attached wave file.
a screen capture attached . I also tried with the Hydrogen appimage (1.2.2) and get the same bug.
Last edit: henry-couannier 2023-10-02
I also tested with another song : the one that opens with Hydrogen by default: same problem ! so it's not related to my specific project
Moved to https://github.com/hydrogen-music/hydrogen/issues/1853
Closing in here