Ubuntu 18.04 - Double icons on the dash and on the panel

[Apanta]

Hello.
Yesterday I updated the s.o. to the 5.3.0-45 kernel. Restarted and worked for at least 3 hours, all ok.
This morning, starting the PC I saw that on the side dash and on the upper panel the icons are all double.
These are the data of my Ubuntu:

apanta@apanta-desktop:~$ inxi -Fzr
System:    Host: apanta-desktop Kernel: 5.3.0-45-generic x86_64 bits: 64
           Desktop: Gnome 3.28.4 Distro: Ubuntu 18.04.4 LTS
Machine:   Device: desktop Mobo: ASRock model: K10N78FullHD-hSLI.. serial: N/A
           BIOS: American Megatrends v: P2.30 date: 04/30/2010
CPU:       Dual core AMD Athlon 64 X2 5200+ (-MCP-) cache: 1024 KB
           clock speeds: max: 2700 MHz 1: 2400 MHz 2: 2400 MHz
Graphics:  Card-1: NVIDIA C77 [GeForce 8200]
           Card-2: NVIDIA GF106 [GeForce GTS 450]
           Display Server: x11 (X.Org 1.20.5 ) driver: nvidia
           Resolution: 1280x1024@60.02hz, 1280x1024@60.02hz
           OpenGL: renderer: GeForce GTS 450/PCIe/SSE2
           version: 4.6.0 NVIDIA 390.116
Audio:     Card-1 NVIDIA GF106 High Def. Audio Controller
           driver: snd_hda_intel
           Card-2 TerraTec Electronic Aureon Dual USB driver: USB Audio
           Card-3 Logitech Webcam C310 driver: USB Audio
           Sound: Advanced Linux Sound Architecture v: k5.3.0-45-generic
Network:   Card-1: NVIDIA MCP77 Ethernet driver: forcedeth
           IF: enp0s10 state: down mac: <filter>
           Card-2: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
           driver: r8169
           IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives:    HDD Total Size: 3500.7GB (22.6% used)
           ID-1: /dev/sda model: Samsung_SSD_850 size: 500.1GB
           ID-2: /dev/sdb model: ST2000DM001 size: 2000.4GB
           ID-3: /dev/sdc model: ST31000528AS size: 1000.2GB
Partition: ID-1: / size: 49G used: 11G (23%) fs: ext4 dev: /dev/sda6
           ID-2: swap-1 size: 8.00GB used: 0.00GB (0%)
           fs: swap dev: /dev/sda1
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 29.0C mobo: N/A gpu: 37C
           Fan Speeds (in rpm): cpu: N/A
Repos:     Active apt sources in file: /etc/apt/sources.list
           deb http://it.archive.ubuntu.com/ubuntu/ bionic main restricted
           deb http://it.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
           deb http://it.archive.ubuntu.com/ubuntu/ bionic universe
           deb http://it.archive.ubuntu.com/ubuntu/ bionic-updates universe
           deb http://it.archive.ubuntu.com/ubuntu/ bionic multiverse
           deb http://it.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
           deb http://it.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
           deb http://archive.canonical.com/ubuntu bionic partner
           deb http://security.ubuntu.com/ubuntu bionic-security main restricted
           deb http://security.ubuntu.com/ubuntu bionic-security universe
           deb http://security.ubuntu.com/ubuntu bionic-security multiverse
           Active apt sources in file: /etc/apt/sources.list.d/gerardpuig-ubuntu-ppa-bionic.list
           deb http://ppa.launchpad.net/gerardpuig/ppa/ubuntu bionic main
           Active apt sources in file: /etc/apt/sources.list.d/pj-assis-ubuntu-ppa-bionic.list
           deb http://ppa.launchpad.net/pj-assis/ppa/ubuntu bionic main
           Active apt sources in file: /etc/apt/sources.list.d/skype-stable.list
           deb [arch=amd64] https://repo.skype.com/deb stable main
Info:      Processes: 205 Uptime: 17 min Memory: 1446.2/7457.4MB
           Client: Shell (bash) inxi: 2.3.56 
apanta@apanta-desktop:~$ 

noticed that the icons that I had added to favorites or that were present by default are "clickable and operational", while the other icons that have appeared now are not accessible.
This is very annoying.
icone doppie 1.png
icone doppie.jpg
I read a discussion a few years ago where it was written that it could be a cache and history problem to be deleted, but I would not know where to look if not here:

Pulizia file temp.png
Tried booting with the 5.3.0-42 kernel, but the problem persists.
I also saw inside usr/share/applications, but the icons into the folder are single and not duplicated.
Please I need your help to solve, thanks

[Apanta]

Ok solved it by uninstalling dconf-editor