Highly detrimental interaction between clipboard management and LibreOffice
I am running xfce4 version 20 on a frequently updated OpenSUSE Tumbleweed installation. In particular,
xfsettingsd --version reports
xfsettingsd 4.20.0git-UNKNOWN (Xfce 4.20)
...In a relatively vanilla configuration of xfce4, except that I uninstalled and completely removed xfce4-clipman-plugin from my system for reasons that will become clear momentarily, essentially all LibreOffice applications (spreadsheet, presentation, drawing, etc.) display the following behavior: when an element is cut-and-pasted, it is sporadically (at empirically 33% - 66% frequency) inserted not as the native LibreOffice element, but as a bitmap image of the the LibreOffice element, that can no longer be edited, etc. This pasting behavior renders the LibreOffice suite very frustrating to use, almost to the point of unusability.
There are many reports of such behavior on the LibreOffice forums spanning at least the past 10 years, including several connected with xfce 4.20 in the past few weeks, e.g., https://ask.libreoffice.org/t/libre-impress-cut-and-paste-text-box-results-in-image-not-a-text-box/117857 or https://ask.libreoffice.org/t/copy-paste-of-simple-box-turns-result-into-a-png-image-can-i-stop-this-behaviour/117679 besides my own at https://ask.libreoffice.org/t/libreoffice-copy-paste-issue-xfce-20-3/118601 which has garnered multiple views and likes. In every case over this time period, the eventual cause of the behavior in question has been traced to external clipboard managers that disrupt clipboard entries in formats that they are not cognizant of the details of.
I suspected that something similar was going on with xfce 4.20, and so thanks to the advice I received on https://forum.xfce.org/viewtopic.php?pid=78584, I am now running xfsettingsd with the environment variable setting XFSETTINGSD_NO_CLIPBOARD=1 and the difficulties with cutting and pasting in LibreOffice I was experiencing have disappeared completely. I am filing this issue here at the recommendation of the person on the xfce forum, to suggest that clipboard handling in the xfce4 desktop be enhanced so as not to disrupt LibreOffice, or at least, made easy to shut off completely (i.e, in a way that a naive user not familiar with environment variables or session startup details could easily perform). It seems that such changes would be very beneficial to anyone who wishes to run LibreOffice under xfce 4.20. Thanks for your consideration.