Using the `Shift`+`Prnt` shortcut to select a rectangular region for screenshots does not initiate the selection as expected, but rather, opens the MATE Screenshot GUI utility with the "Select an area to grab" option highlighted. This causes issues with popups or other elements which disappear or dismiss themselves once another window is given focus, or moving points of focus cannot be captured due to the delay in action.
My inxi -Fxzc0
System: Kernel: 5.4.0-21-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: MATE 1.24.0
Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine: Type: Desktop Mobo: ASUSTeK model: PRIME B350-PLUS v: Rev X.0x serial: <filter>
UEFI: American Megatrends v: 5407 date: 12/31/2019
CPU: Topology: 8-Core model: AMD Ryzen 7 2700 bits: 64 type: MT MCP arch: Zen+ rev: 2
L2 cache: 4096 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 108794
Speed: 1377 MHz min/max: 1550/3400 MHz Core speeds (MHz): 1: 1377 2: 1377 3: 1377 4: 1375
5: 1377 6: 1376 7: 1375 8: 1375 9: 1377 10: 1377 11: 1381 12: 1377 13: 1377 14: 1373
15: 1377 16: 1377
Graphics: Device-1: AMD Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] vendor: XFX Pine
driver: amdgpu v: kernel bus ID: 0c:00.0
Display: x11 server: X.Org 1.20.7 driver: amdgpu,ati
unloaded: fbdev,modesetting,radeon,vesa resolution: 3840x1080~144Hz
OpenGL: renderer: AMD Radeon RX 5700 XT (NAVI10 DRM 3.35.0 5.4.0-21-generic LLVM 9.0.1)
v: 4.6 Mesa 20.0.4 direct render: Yes
Audio: Device-1: Creative Labs Sound Core3D [Sound Blaster Recon3D / Z-Series]
driver: snd_hda_intel v: kernel bus ID: 09:00.0
Device-2: AMD Navi 10 HDMI Audio driver: snd_hda_intel v: kernel bus ID: 0c:00.1
Device-3: AMD Family 17h HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel
bus ID: 0e:00.3
Device-4: Logitech HD Pro Webcam C920 type: USB driver: snd-usb-audio,uvcvideo
bus ID: 3-1.3:3
Device-5: C-Media Blue Snowball type: USB driver: hid-generic,snd-usb-audio,usbhid
bus ID: 1-2:2
Device-6: Kingston HyperX Virtual Surround Sound type: USB
driver: hid-generic,snd-usb-audio,usbhid bus ID: 1-9:5
Sound Server: ALSA v: k5.4.0-21-generic
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: ASUSTeK
driver: r8169 v: kernel port: f000 bus ID: 04:00.0
IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: Local Storage: total: 6.60 TiB used: 559.36 GiB (8.3%)
ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 960 EVO 250GB size: 232.89 GiB
ID-2: /dev/sda vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
ID-3: /dev/sdb vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
ID-4: /dev/sdc vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
ID-5: /dev/sdd type: USB vendor: Western Digital model: WD easystore 2624 size: 4.55 TiB
ID-6: /dev/sde vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
Partition: ID-1: / size: 140.56 GiB used: 18.76 GiB (13.4%) fs: btrfs dev: /dev/nvme0n1p7
ID-2: /boot size: 975.9 MiB used: 103.9 MiB (10.6%) fs: ext4 dev: /dev/nvme0n1p6
ID-3: /home size: 140.56 GiB used: 18.76 GiB (13.4%) fs: btrfs dev: /dev/nvme0n1p7
ID-4: swap-1 size: 10.88 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/nvme0n1p4
Sensors: System Temperatures: cpu: 29.2 C mobo: N/A gpu: amdgpu temp: 44 C
Fan Speeds (RPM): N/A gpu: amdgpu fan: 0
Info: Processes: 422 Uptime: 5h 30m Memory: 31.36 GiB used: 2.97 GiB (9.5%) Init: systemd
runlevel: 5 Compilers: gcc: 9.3.0 Shell: bash v: 5.0.16 inxi: 3.0.38
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: mate-utils 1.24.0-1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu26
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Mon Apr 13 16:39:21 2020
InstallationDate: Installed on 2020-04-12 (1 days ago)
InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
SourcePackage: mate-utils
UpgradeStatus: No upgrade log present (probably fresh install)
Status changed to 'Confirmed' because the bug affects multiple users.