After installing both 7.1.6 and 7.2.1 Libreoffice behaved slowly and erratically. Found that after uninstalling libreoffice and then deleting the remnants in the Program directories and and the Appdata directoy and then reinstalling Libreoffice the program behaved normally. Clearly something upset the installation that had been left from the previous installation. windows 10
There should be no need to have 2 installations for normal use. I think they share profile, so it's confusing. For test, the are different solutions, like using SI-GUI to have many parallel LO versions that are not installed, just extracted and with separate profiles. I think I saw similar problems earlier, but are hard to find with general wording.