Why do the tempos suddenly start appearing on all the staves in mid-system here? Notice that the rit at the start of the system appears only on the flute staff and the violin staff. But then from poco accel. on, tempi appear on all the staves. In the uncondensed score they act normally.
The crash is caused by being able to close the Layout Options dialog before the ‘Save as Default’ operation has completed, which then results in Dorico crashing when it tries to update the state of the dialog once the operation has been completed. We’ll make sure this can’t happen in future, i.e. by preventing you from closing the dialog while an operation like this is in progress.