Bug report - tied grace notes on iPad?

I searched the forum for this but I couldn’t find any reference to it, so apologies if I’m rehashing. I’m traveling so working from iPad, and upon opening my Dorico file, I find that all of the tied grace notes in the project are no longer tied to their respective notes. This is a bug, right?

I created this file on Mac (where I normally work).

It certainly sounds like one, but it seems extremely unlikely. Can you attach a project in which this occurs?