After Mate suspend, the screen is not locked

[Mike Fairbank]

I can choose to suspend the computer, and it works fine. But when I wake the computer up, it doesn't lock the screen.

If I leave the computer and it locks itself, and then suspends (after the given timeperiod) then that works fine too, but then when the computer is woken up, the screen-lock is present. But when I actively suspend the computer myself, the screen lock does not get used.

I found a workaround, described here, which worked:
https://ubuntu-mate.community/t/how-to-lock-screen-on-suspend/16836/7

But it is a security risk not to have this functionality working by default.

I'm on Ubuntu Mate 20.04

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mate-terminal 1.24.0-2ubuntu1
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: MATE
Date: Sun May 24 19:10:07 2020
InstallationDate: Installed on 2020-04-25 (29 days ago)
InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: mate-terminal
UpgradeStatus: No upgrade log present (probably fresh install)