Fonts is not responding

Just started fonts, the window opens but mouse arrow is inoperative on the window. after some time a message appears saying 'fonts is not responding'

corrado@corrado-n8-hh-0101:~$ apt policy gnome-font-viewer
gnome-font-viewer:
  Installed: 3.34.0-2
  Candidate: 3.34.0-2
  Version table:
 *** 3.34.0-2 500
        500 http://archive.ubuntu.com/ubuntu hirsute/main amd64 Packages
        100 /var/lib/dpkg/status
corrado@corrado-n8-hh-0101:~$ inxi -SCGx
System: Host: corrado-n8-hh-0101 Kernel: 5.8.0-25-generic x86_64 bits: 64 compiler: gcc v: 10.2.0 Desktop: GNOME 3.38.2
           Distro: Ubuntu 21.04 (Hirsute Hippo)
CPU: Info: Quad Core model: Intel Core i5-1035G1 bits: 64 type: MT MCP arch: Ice Lake rev: 5 L2 cache: 6 MiB
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 19046
           Speed: 1000 MHz min/max: 400/1000 MHz Core speeds (MHz): 1: 1000 2: 967 3: 995 4: 872 5: 954 6: 961 7: 984
           8: 717
Graphics: Device-1: Intel Iris Plus Graphics G1 vendor: Dell driver: i915 v: kernel bus ID: 00:02.0
           Device-2: Realtek Integrated_Webcam_HD type: USB driver: uvcvideo bus ID: 1-6:3
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz
           OpenGL: renderer: Mesa Intel UHD Graphics (ICL GT1) v: 4.6 Mesa 20.2.6 direct render: Yes
corrado@corrado-n8-hh-0101:~$

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: gnome-font-viewer 3.34.0-2
ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
Uname: Linux 5.8.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu55
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Jan 4 08:25:41 2021
ExecutablePath: /usr/bin/gnome-font-viewer
InstallationDate: Installed on 2021-01-01 (2 days ago)
InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210101)
SourcePackage: gnome-font-viewer
UpgradeStatus: No upgrade log present (probably fresh install)