Missing fonts in a document were usually showed with a replaced standard font and a light red highlight, so it pops you in the eye directly.
In the new InDesign 16.1 on macOS Catalina 10.15.7 this feature is suddendly missing for me. The text with the missing font is completely invisible. Just an empty textbox. Just when you klick in it or open the preflight window, there you can see the errors.

Did I miss some new settings? Sometimes you just want to quickly edit the text and generate the final pdf later. Would be great if can enable this feature again.
Thanks!