After I updated to the latest version, my Steam window looks like in the second screenshot every time when I launch Steam. I can only fix it by maximizing and unmaximizing the Steam window.

Identical issue on my up-to-date Arch Linux system since latest update. Both stable and beta branches are affected.

I can confirm this issue on Arch as well. Resizing the window will make the page display correctly, but any of the web based pages (community, store, profile) will require one of those to be resized as well, then all web pages work correctly. Oddly, while resizing the library will not affect the other pages, if you resize one of the web pages it will also fix the library page.

The windows will only display correctly until Steam is completely shut down. Upon restarting Steam the issue returns.

Truncated system info:
Processor Information:
CPU Vendor: AuthenticAMD
CPU Brand: AMD Ryzen 7 3800X 8-Core Processor

Operating System Version:
"Arch Linux" (64 bit)
Kernel Name: Linux
Kernel Version: 5.15.2-arch1-1
X Server Vendor: The X.Org Foundation
X Server Release: 12101001
X Window Manager: KWin
Steam Runtime Version: steam-runtime_0.20211102.0

Video Card:
Driver: AMD AMD Radeon RX 6800 XT (SIENNA_CICHLID, DRM 3.42.0, 5.15.2-arch1-1, LLVM 13.0.0)
Driver Version: 4.6 (Compatibility Profile) Mesa 21.2.5
OpenGL Version: 4.6
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 144 Hz
VendorID: 0x1002
DeviceID: 0x73bf
Revision Not Detected
Number of Monitors: 2
Number of Logical Video Cards: 1
Primary Display Resolution: 1920 x 1080
Desktop Resolution: 3840 x 1080
Primary Display Size: 20.91" x 11.77" (23.98" diag)
53.1cm x 29.9cm (60.9cm diag)
Primary VRAM: 16384 MB

Same issue here on Arch Linux

Operating System Version:
"Arch Linux" (64 bit)
Kernel Name: Linux
Kernel Version: 5.15.2-217-tkg-pds
X Server Vendor: The X.Org Foundation
X Server Release: 12101001
X Window Manager: Metacity (Marco)
Steam Runtime Version: steam-runtime_0.20211102.0

Video Card:
Driver: NVIDIA Corporation NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2
Driver Version: 4.6.0 NVIDIA 495.44
OpenGL Version: 4.6
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 169 Hz

Same issue for me, ubuntu 20.04

Can confirm as well. Linux Mint 20.2 w/Nvidia Drivers 470.82.00.

Seems to have been introduced in the beta that was available at Nov. 8th this year, or that was at least the first time I noticed these issues. Then with the previous version of the Nvidia drivers, and Linux Mint 20.1.

This is still happening and is very annoying. Same thing every time steam starts. Pls fix

This issue seems to be fixed on the latest beta, at least for me.

This issue seems to be fixed on the latest beta, at least for me.

not here still the same after testing the beta

I just noticed something about this issue, not sure if it will be helpful but:

You can also get both the library and web pages (store, community and profile) by dragging the window around the desktop. When you stop moving the window it will display correctly.

Maximizing the window will cause it to display correctly and it will still be correct when restored to widowed size.

However, just minimizing and restoring the widow does not fix the issue.

My starting page changed to "Store" (Perhaps due to an update? If so it was silent). That fixes the issue, but when I change it back to "Library" the issue appears again.

My starting page changed to "Store" (Perhaps due to an update? If so it was silent). That fixes the issue, but when I change it back to "Library" the issue appears again.

Why the start page changed to the store I can't say but it's very unlikely that it's actually fixed just by having to start page changed.

This is a rendering issue evidence by the fact that if you maximize or move the window forcing the app to be redrawn it covers the entire window like it's supposed to.

More likely starting the app on the store Page is not affecting the rendering quite the same way so it renders properly for web-based pages (which is all the pages with the exception of the library page) but as the library is handled different the rendering issue still affects the library

The library is separate from all the other pages if you fix the library page by maximizing or dragging the window it does not affect the other web base pages and vice versa, but, fixing one of the web-based pages fixes all of the others.

As an aside I don't think valve does any silent updates, more likely your user configurations were corrupted so when the app started it went back to the store Page which I believe is the default start page

If you start with Store, the library fixes too. You can see it flicker once, with the dark line at the bottom disappear automatically.

Sometimes Steam will not notify you of an update and do it on startup automatically. That is what I was referring to.

Fixed for me, no matter the starting page steam works as expected.

I still have this issue. Still have to resize the window to work around it. One thing that has changed is that it is now present out of the beta client as well.
https://github.com/ValveSoftware/steam-for-linux/issues/8174#issuecomment-967782802

Try enabling the gpu acceleration options in the interface options in settings, the three last.

Still happening here as well. This only happens when GPU acceleration is disabled from Steam. Latest steam Beta client.

Enabling GPU acceleration fixes this issue, but that will add different kind of bug. Namely with GPU acceleration enabled, resizing steam windows will cause VRAM usage grow with every resize until its completely used.

Operating System Version:
    "Arch Linux" (64 bit)
    Kernel Name:  Linux
    Kernel Version:  5.16.3-xanmod1-1
    X Server Vendor:  The X.Org Foundation
    X Server Release:  12101003
    X Window Manager:  Metacity (Marco)
    Steam Runtime Version:  steam-runtime_0.20220119.0

Video Card:
    Driver:  NVIDIA Corporation NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2
    Driver Version:  4.6.0 NVIDIA 510.39.01
    OpenGL Version: 4.6
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 169 Hz
    VendorID:  0x10de
    DeviceID:  0x1b06
    Revision Not Detected
    Number of Monitors:  2
    Number of Logical Video Cards:  1
    Primary Display Resolution:  2560 x 1440

Can confirm that the bug only occurs with hardware acceleration disabled and that it is still present with steam client from Mar 5 2022.

Additional confirmation here, on latest Manjaro-Gnome, as of this date the web views in steam is still bugged. With the option "gpu accelerated web page rendering" disabled, the bug persists, but behaves normally if it is enabled.
Kind of a serious usability issue here guys, some help would be nice.
Using gnome-shell on X11 with a radeon 6700xt gpu and the default drivers.