Most likely, you are correct. I have had issues with the distribution builds of LO, so I use LibreOffice-fresh-rpm from the AUR. The PKGBUILD converts the .rpm directly from TDF (The Document Foundation) to .zst and installs. I have not had any issues since. YMMV.
I’m still experiencing the same issue with libreoffice-still and libreoffice-fresh from the repositories.
I’ve now installed the flatpak version and found this works without any strange copy cut paste issues. The downside to the flatpak version is that I could not find any way to make it look dark like the rest of my system.
I’ve never experienced that issue in LO but I have always had problems with typing lag, especially in documents with inserted pictures. I solved that by getting rid of LO 7 (installed from the Manjaro repo) and getting an appimage of LO 6 direct from the LO website.
I’ve not tried the appimage of version 7 as I always found 6 to be less laggy when installed from the Manjaro repo.