@PhilJ, I think you hit this bug: https://bugs.launchpad.net/bugs/1882890
Could you please try to update the intel-microcode package to version 3.20200609.0ubuntu0.18.04.1 (just uploaded to bionic-security a few hours ago) and confirm it fixes your problem?
@PhilJ, I think you hit this bug: https:/ /bugs.launchpad .net/bugs/ 1882890 0ubuntu0. 18.04.1 (just uploaded to bionic-security a few hours ago) and confirm it fixes your problem?
Could you please try to update the intel-microcode package to version 3.20200609.