Sometimes notifications stay unless I close them manually

[Cesar Pulido]

Ubuntu 19.04
notify-osd 0.9.35+16.04.20160415-0ubuntu3
The notifications should automatically disappear after a short time.
However, the notifications can remain for a long time and I have to close them manually.
Happens sometimes and doesn't seem to be specific to a type of notification.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: notify-osd 0.9.35+16.04.20160415-0ubuntu3
ProcVersionSignature: Ubuntu 5.0.0-13.14-generic 5.0.6
Uname: Linux 5.0.0-13-generic x86_64
ApportVersion: 2.20.10-0ubuntu27
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu May 2 00:23:46 2019
DesktopSession: 'ubuntu'
GtkTheme: 'Yaru'
IconTheme: 'Yaru'
InstallationDate: Installed on 2017-08-26 (613 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 258a:1007
 Bus 001 Device 002: ID 258a:0013
 Bus 001 Device 017: ID 2a70:f00e
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: MSI MS-7A74
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-13-generic root=UUID=dbbebe04-09ad-4bf2-bb2b-f797cad3693f ro quiet splash vt.handoff=1
RelatedPackageVersions:
 xserver-xorg 1:7.7+19ubuntu12
 libgl1-mesa-glx 19.0.2-1ubuntu1
 libdrm2 2.4.97-1ubuntu1
 xserver-xorg-video-intel 2:2.99.917+git20180925-2
 xserver-xorg-video-ati 1:19.0.1-0ubuntu1
SourcePackage: notify-osd
UpgradeStatus: Upgraded to disco on 2019-04-21 (11 days ago)
dmi.bios.date: 04/06/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.40
dmi.board.asset.tag: Default string
dmi.board.name: B250M PRO-VD (MS-7A74)
dmi.board.vendor: MSI
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: MSI
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.40:bd04/06/2017:svnMSI:pnMS-7A74:pvr1.0:rvnMSI:rnB250MPRO-VD(MS-7A74):rvr1.0:cvnMSI:ct3:cvr1.0:
dmi.product.family: Default string
dmi.product.name: MS-7A74
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: MSI

[Cesar Pulido (cesaar)]

I recently noticed that long-appearance-time notifications happen when I'm reading and not using the mouse or keyboard.
A second after I click anywhere with my mouse, it disappears. If I don't do this, it will definitely remain there for minutes.