This bug also affects me. It is probably this bug in Document Foundation's bugzilla: https://bugs.documentfoundation.org/show_bug.cgi?id=131610
It is also probably related to bug #1911072 For me the bug is not stably reproducible. It sometimes occurs on the first time I apply a transition, sometimes only after applying several different transitions. A backtrace log is attached. ** Bug watch added: Document Foundation Bugzilla #131610 https://bugs.documentfoundation.org/show_bug.cgi?id=131610 ** Attachment added: "gdbtrace_crash.log" https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1877559/+attachment/5479360/+files/gdbtrace_crash.log -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreoffice in Ubuntu. https://bugs.launchpad.net/bugs/1877559 Title: LibreOffice Impress crash on apply a transition effect to a slide Status in libreoffice package in Ubuntu: Expired Bug description: On a fresh install of Ubuntu 20.04, LibreOffice Impress crash when selecting transition effect to slides. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: libreoffice-impress 1:6.4.3-0ubuntu0.20.04.1 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 Uname: Linux 5.4.0-29-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Fri May 8 11:49:25 2020 InstallationDate: Installed on 2020-05-05 (2 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=es_ES.UTF-8 SHELL=/bin/bash SourcePackage: libreoffice UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1877559/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp