The problem is probably midiClock+modeIncludingSlave.
If not, check if the error occurs when saving or loading.
To do this, monitor the session file in a text editor when you save. The data is stored in the "tempo-map" tag.
If it saves correctly but Qtractor indicates something different when opened, it's a "Jack" session problem (for example midiClock+modeIncludingSlave).
PS
I haven't been able to reproduce the problem with any configuration.
Reset options again?
https://github.com/rncbc/qtractor/issues/500
The problem is probably midiClock+modeIncludingSlave.
If not, check if the error occurs when saving or loading.
To do this, monitor the session file in a text editor when you save. The data is stored in the "tempo-map" tag.
If it saves correctly but Qtractor indicates something different when opened, it's a "Jack" session problem (for example midiClock+modeIncludingSlave).
PS
I haven't been able to reproduce the problem with any configuration.
Reset options again?