GnuCash 3.4 was just released. Please upgrade. It has important bug fixes in it (the one I specifically care about is this one, https://bugs.gnucash.org/show_bug.cgi?id=796875, which is a huge usability issue in GnuCash 3.3).
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gnucash 1:3.3-2
ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17
Uname: Linux 4.18.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Dec 30 17:49:21 2018
InstallationDate: Installed on 2016-01-16 (1079 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: gnucash
UpgradeStatus: Upgraded to cosmic on 2018-10-20 (71 days ago)
modified.conffile..etc.apport.crashdb.conf: [modified]
mtime.conffile..etc.apport.crashdb.conf: 2018-10-04T07:35:17.955033
Gnucash 3.4 is now available in Ubuntu Disco, our development release.