Hi @delianet ,
Thank you for joining our community.
It can be frustrating when familiar tools malfunction. It seems you’ve hit a snag with Looker Studio’s copy-paste function. While there are no mentions in the release notes and incident reports haven’t surfaced yet, others might be experiencing this as well. Looker Studio’s new community forum is a great place to get help. Experienced Looker Studio users and Google experts are there to assist you.
I hope I was able to provide you with useful insights.