jog

Maybe this is related: export and open/save dialogs are also hidden under some palettes. macOS 10.14.6 and 10.15.4, Designer 1.8.3 — this affects Publisher too, btw

Follow-up: after some checking I found out that it's a font-related issue, possibly with Linotype FontExplorer. I had to disable and re-enable the font – now everything behaves as expected.

I don't know if this classifies as a bug, but PDF exports from the same file with the same settings under 10.11 and 10.12 produce different results. In this case, text in files exported under 10.12 can't be selected & copied, neither in Acrobat and Preview.