Virtualbox - manager or VM itself - unusuable in some multi-monitor configurations

[Matthew]

In a multi-monitor configuration, if the top edge of the RHS monitor is positioned above that of the LHS one, Virtualbox is completely unusuable. The manager is either blank or composed of artefacts, and if starting the VM (eg from the command line) it too is completely corrupted/unusuable.

Aligning the top edges of the monitors resolves this (but in my case one is portrait and it needs to be higher). I am using Xorg but this also exhibits on Wayland.

This seems new in 20.04 - I was using the same configuration on 19.10 without issues. So far no other software is affected, only Virtualbox.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: virtualbox 6.1.6-dfsg-1
ProcVersionSignature: Ubuntu 5.4.0-31.35-generic 5.4.34
Uname: Linux 5.4.0-31-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed May 20 17:36:48 2020
InstallationDate: Installed on 2020-05-17 (2 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: virtualbox
UpgradeStatus: No upgrade log present (probably fresh install)