Hi all -
This is a bit odd - I have managed to fix it by breaking the tie and then making sure that each note on either side does not have the accidental default over-ridden.
Basically - when the notes were tied, both notes showed the sharp. On the panel , accidental was overwritten and "show"chosen. When I went to turn it back to default, the result was the below screenshot.
Obviously it’s because the second G# will be a copy of the first with the default overwritten - however it means that where I’m used to tied notes acting as a single note of a certain length, here they’re treated as separate notes, and there’s no way of hiding that second accidental without first breaking the tie.
Not sure if this is a necessary quirk or a bug! It seems slightly out of keeping with the paradigm…