When there is a trill under a slur, like this:
the play panel shows the last two notes as non-legato with natural technique and shorted note lengths.
I assume this is the same type of problem that affects legato slurs.
There are similar problems with nested slurs, etc.
Is a fix for this coming anytime soon?
You could consider defining appropriate switches in the expression map for trills together with legato. I suspect the issue is that your expression map defines only one or the other.
What about when using generated trills? I don’t even get this problem with sampled trills.
EDIT: seems like when trills are not defined in playback dorico falls back to generating them anyways so switching to sampled trills just fixes the problem