Hey Martin,
Sorry for the trouble here with images not importing from Facebook!
I tried importing both of those events into my test site. It appears that the images imported in both cases. Here’s a screenshot of the first one, as an example.
Do the images properly import when the default WordPress Twenty Seventeen theme is active? I would like you to test that because some themes use different methods for handling featured images and switching will help confirm that in this case.
Secondly, will you please navigate to your Media library and check that those images were added there, even if they do not display on the event post?
Let’s start there and see what we find. 🙂
Cheers!
Geoff