I know there are several topics to jump bar related issues, still I thought I would open a new one.
I have a quite reproducible issue with the jump bar, when trying to reperform tasks.
This example shows an extreme version of it: usually I am able to at least repeat the last entry once. But after that, Dorico clears the jump bar entry internally (without clearing the field), resulting in no action/wrong actions.
In this particular case, the second swap voices won’t work, then the empty jump bar tries to perform a divisi change out of nowhere.