Hi @Thierry_Meulemans ----- Thank you for the report and apologies for the troubles. May I kindly ask you please give us the details of your setup as seen here.
Furthermore, would you be able to send us a sample of content that you are noticing this issue with via a dropbox link in a PM? We would like to examine this issue in house to try and reproduce. If you could compress the content first and then provide a download link in a PM we would greatly appreciate it. If you are not a dropbox user I can provide another upload method.
-Eric