If you try to insert a multi-tremolo for two notes, but the second selected note has a tie, Dorico, even though the resulting duration is the same as the first note, will not apply the tremolo.
The solution is simple: force the duration of the second note with the “O” key.
I checked the other threads, but I’m not sure whether it’s the same issue.
I don’t want the result to be a tremolo tied to following notes. I’m simply not able to apply the tremolo if the second selected note has a tie due to the meter, even though it has the same duration of the first.