KGIII,Thanks to your very clear steps I've reproduced this on hirsute Lubuntu.
Further testing suggests that the crash will occur if at least one Libreoffice application is opened when Impress is opened AND then you immediately open Libreoffice Math and then go back and select the vivid theme. While I agree we have a bug here, it is a super corner case to hit. ** Changed in: libreoffice (Ubuntu) Importance: Undecided => Low -- 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/1905322 Title: LibreOffice crashes under load. Status in libreoffice package in Ubuntu: Confirmed Bug description: lsb_release -rd Description: Ubuntu Hirsute Hippo (development branch) Release: 21.04 apt-cache policy libreoffice libreoffice: Installed: (none) Candidate: 1:7.0.3-0ubuntu1 Version table: 1:7.0.3-0ubuntu1 500 500 http://archive.ubuntu.com/ubuntu hirsute/universe amd64 Packages I expect to be able to open all of LibreOffice's apps at once and use them. If you open all the LibreOffice applications and then select a template for LibreOffice Writer, they all close immediately, reopen, and offer to recover any lost data. Error reports may have been sent. I am not sure as this is Hirsute and I'm testing it. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: libreoffice (not installed) ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14 Uname: Linux 5.8.0-25-generic x86_64 ApportVersion: 2.20.11-0ubuntu51 Architecture: amd64 CasperMD5CheckResult: pass CasperVersion: 1.455 CurrentDesktop: LXQt Date: Mon Nov 23 20:06:19 2020 LiveMediaBuild: Lubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20201123) 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/1905322/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

