Black boxes replace images in Mojave (Was "No subject")

[hh]

> Matthias R. wrote:
> Mostly after a restart of the app, sometimes after 2 - 4 restarts
> the png was correctly displayded (orange).
> Tried with paint compression set to png also, but without success.

Just out of interest:

Happened this in the standalone only, not in the IDE?
Happened this on Mac only?
Happened this in both lightMode and darkMode?

This may be a bug of MacOS rather than of LC ...