getRenderedContent() fails on PDF Export

Particular case:
Meeting Application - when a google map is displayed in the meeting.

To reproduce:
install meeting application
create a meeting -> fill in description and notes - see attached screenshot
export the meeting as pdf
Expected result: all the information in the meeting, including notes, description, participants, etc should be present in the exported pdf
Actual result: only part of the fields are exported, notably description and notes seem to be missing -> see attached pdf