Visual glitches in window control buttons

[Nicholas Guriev]

Background of the right window control button has non-rounded left corners which do not smoothly shimmer with other prelights. See attached zoomed image. I think there should not be an explicit transition.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-mate-themes 20.04.2
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CasperVersion: 1.445
CurrentDesktop: MATE
Date: Sat Jun 20 07:41:41 2020
LiveMediaBuild: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-mate-artwork
UpgradeStatus: No upgrade log present (probably fresh install)

[Martin Wimpress  (flexiondotorg)]

The Yaru MATE themes are default since Ubuntu MATE 21.04. The Ambiant-MATE and Radiant-MATE themes are deprecated and will not get any updates.