It’s perfectly legitimate to have grace notes tied to the next note (although I find some people are surprised by this). Dorico does not do playback correctly. It makes a new attack, This means I have to notate the note value instead, which misses the point, and makes pieces much harder to read with all the needed preceding rests.
As I write this the helpful Discourse side panel assistant shows me this was raised in Dec 19. Hence apologies if people are annoyed that I post about this topic again but it’s 2022 now and this has not been addressed. For example, you can’t properly playback pieces by not unreasonable composers like Faure.