After updating these packages with the proposed packages, it seems to resolve the issue:
xserver-xorg-video-amdgpu-hwe-18.04:amd64 from 19.0.1-1~18.04.1 to 19.0.1-1ubuntu1~18.04.1 and xserver-xorg-video-ati-hwe-18.04:amd64 from 1:19.0.1-0ubuntu1~18.04.1 to 1:19.0.1-1ubuntu1~18.04.1 and xserver-xorg-video-radeon-hwe-18.04:amd64 from 1:19.0.1-0ubuntu1~18.04.1 to 1:19.0.1-1ubuntu1~18.04.1 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1841718 Title: [radeon] Rendering of combo boxes and tooltips is broken To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-driver-ati/+bug/1841718/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp