Steam freezes and crashes on Ubuntu 20.04 , but not in Windows

[[e-mail]]

We play Dota 2 in Steam on Ubuntu (since the game was just Warcraft and on Ubuntu 9.04, 10.10, 12.04, 16.04 and now trying on 20.04), but the Steam freezes and crashes(within a few minutes) without any err msg.
Can you please have a look!?

raj@raj:~$ steam
Running Steam on ubuntu 20.04 64-bit
STEAM_RUNTIME is enabled automatically
Pins up-to-date!
Steam client's requirements are satisfied
WARNING: Using default/fallback debugger launch
/home/raj/.steam/debian-installation/ubuntu12_32/steam -nominidumps -nobreakpad
[2021-05-16 01:47:32] Startup - updater built Apr 12 2021 18:51:36
[2021-05-16 01:47:32] Using the following download hosts for Public, Realm steamglobal
[2021-05-16 01:47:32] 1. https://cdn.cloudflare.steamstatic.com, /client/, Realm 'steamglobal', weight was 100, source = 'update_hosts_cached.vdf'
[2021-05-16 01:47:32] 2. https://cdn.akamai.steamstatic.com, /client/, Realm 'steamglobal', weight was 100, source = 'update_hosts_cached.vdf'
[2021-05-16 01:47:32] 3. http://media.steampowered.com, /client/, Realm 'steamglobal', weight was 1, source = 'baked in'
[2021-05-16 01:47:32] Verifying installation...
[2021-05-16 01:47:33] Verification complete
STEAM_RUNTIME_HEAVY: ./steam-runtime-heavy
raj@raj:~$

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.32
ProcVersionSignature: Ubuntu 5.8.0-53.60~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-53-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.17
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sun May 16 01:39:11 2021
InstallationDate: Installed on 2021-05-06 (9 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: No upgrade log present (probably fresh install)

[[e-mail] (silicon-slice)]

Though at first crash I got an error, before installing all the Graphics Packages. I took a screenshot. Please have a look at the attached file.

[Bryce Harrington (bryce)]

Seems to be a bug in steam itself, apparently now fixed upstream in the beta:
https://github.com/ValveSoftware/steam-for-linux/issues/7813