Thank you, I have created FB19538213 for this issue. Using a trigger collision is my current workaround. It does mean that I have to separate some state logic across methods but I'm not doing anything complicated at the moment where that is a problem.

I have created FB19426676. It includes a sample project that reproduces the issue on my device. (apologies for the duplicate I was getting an error while responding)

I have created FB19426676 . It includes a sample project and an example PDF file. The PDF file was created by printing a page from the Apple website and saving it as a PDF. (apologies for the duplicate I was getting an error while responding)