Facebook button publishes about nothing for certain posts !

Hello,

recently I saw that using the Facebook button doesn’t show first lines of some articles or just nothing from the article (only a link to the blog) !
It works fine with other articles…
No problem with other buttons detected…

I don’t understand why and ask your help…

Example of working article:
https://ecollart.xyz/avoir-plus-de-temps-pour-decrocher-son-gsm-cest-possible/ : this is an old article that I simply updated.
https://ecollart.xyz/voici-le-loup/ (published by mail, Thunderbird + Postie)

Examples of article missing first lines:
https://ecollart.xyz/court-essai-de-virus-keeper-free/
https://ecollart.xyz/quelques-news-pour-juin/

Example or article with just a link to the blog and no content:
https://ecollart.xyz/salade-de-viande-et-isolat-de-proteines-pois/

Not sure if it is related but problematic articles above were published using Open Live Writer. I use it since a while and published articles looks ok on my site…

Thanks for any help or hint coz I am a bit lost !

Eric Collart
https://ecollart.xyz