Hi, thank you for your bug report. I am adopting Eterm package, so I am reviewing bug reports to try to fix some of them. I can confirm that
Package: Eterm Version: 0.9.6-5 Debian version: 9.5 has this problem. I cannot copy and paste into openoffice/libreoffice, but cut and paste is working with my e-mail client, emacs,... I have checked that another terminals can copy and paste into openoffice/libreoffice. I do not know the details of "copy and paste procedure" to understand this behaviour. More investigation about this is needed to find where the problem come from. Regards, Jose