Odd behavior in xorg with libinput

[Cameron Holman]

https://www.youtube.com/watch?v=Eqo16hLQWSY&feature=youtu.be
Demonstrated using qdirstat. Similar behavior in k4dirstat, the qt desktop menu of retroarch, gnu octave. In qdirstat, it wants to select the cells when I click on one of them. In retroarch it likes to select the text on the welcome screen as well. In the boxes to the right, the file name doesn't display until I move my mouse after I click on one of them. In octave my mouse wants to highlight the welcome text. These issues do not appear while the synaptics touchpad driver is installed, so libinput may be the culprit.
The wine version of WinDirStat works fine with either input driver.

Ubuntu 18.04.2 LTS
xserver-xorg-input-libinput 0.27.1-1
libqt5gui5 5.9.5+dfsg-0ubuntu2
qdirstat 1.4-2

There is another potentially unrelated issue I've been having, which also doesn't appear when using the synaptics driver, in which when I click on one of my created bookmarks on the left side of nautilus, my mouse appears to automatically drag the bookmark, as if I wanted to move it to a new location, much like how it drags the cells or text in qt, but in gtk.

None of these issues appear when I log in using Ubuntu Wayland.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xserver-xorg-input-libinput 0.27.1-1
ProcVersionSignature: Ubuntu 4.15.0-46.49-generic 4.15.18
Uname: Linux 4.15.0-46-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CurrentDesktop: ubuntu:GNOME
Date: Tue Mar 19 13:25:25 2019
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
InstallationDate: Installed on 2019-02-10 (37 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 004: ID 8087:0a2a Intel Corp.
 Bus 001 Device 003: ID 1bcf:2c83 Sunplus Innovation Technology Inc.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: HP HP ENVY x360 m6 Convertible
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-46-generic root=UUID=2f207372-a130-4d7d-b503-a88658e80987 ro quiet splash vt.handoff=1
SourcePackage: xserver-xorg-input-libinput
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/14/2018
dmi.bios.vendor: Insyde
dmi.bios.version: F.57
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81AD
dmi.board.vendor: HP
dmi.board.version: 58.54
dmi.chassis.type: 31
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.57:bd11/14/2018:svnHP:pnHPENVYx360m6Convertible:pvrType1ProductConfigId:rvnHP:rn81AD:rvr58.54:cvnHP:ct31:cvrChassisVersion:
dmi.product.family: 103C_5335KV
dmi.product.name: HP ENVY x360 m6 Convertible
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1~18.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.3.3-1ubuntu1~18.04~ppa1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.3.3-1ubuntu1~18.04~ppa1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2