Steam stuck on loading screen

### Problem Description
Steam stuck on loading screen. After a few hours it managed to open and worked as usual, but shortly after Steam disconnected and after restarting it stuck again.
***

### Logs
**flatpak run com.valve.software.Steam**

```
[tt@seadragon ~]$ flatpak run com.valvesoftware.Steam
INFO:root:https://github.com/flathub/com.valvesoftware.Steam/wiki
INFO:root:Will set XDG dirs prefix to /home/tt/.var/app/com.valvesoftware.Steam
DEBUG:root:Checking input devices permissions
WARNING:root:Missing permissions for input devices
steam.sh[2]: Running Steam on org.freedesktop.platform 23.08 64-bit
steam.sh[2]: STEAM_RUNTIME is enabled automatically
setup.sh[74]: Steam runtime environment up-to-date!
steam.sh[2]: Steam client's requirements are satisfied
tid(108) burning pthread_key_t == 0 so we never use it
[2024-01-16 16:13:48] Startup - updater built Jan 13 2024 00:51:43
[2024-01-16 16:13:48] Startup - Steam Client launched with: '/home/tt/.var/app/com.valvesoftware.Steam/.local/share/Steam/ubuntu12_32/steam' '-no-cef-sandbox'
01/16 16:13:48 Init: Installing breakpad exception handler for appid(steam)/version(1705108172)/tid(108)
[2024-01-16 16:13:49] Loading cached metrics from disk (/home/tt/.var/app/com.valvesoftware.Steam/.local/share/Steam/package/steam_client_metrics.bin)
[2024-01-16 16:13:49] Using the following download hosts for Public, Realm steamglobal
[2024-01-16 16:13:49] 1. https://client-update.akamai.steamstatic.com, /, Realm 'steamglobal', weight was 1000, source = 'update_hosts_cached.vdf'
[2024-01-16 16:13:49] 2. https://cdn.cloudflare.steamstatic.com, /client/, Realm 'steamglobal', weight was 1, source = 'update_hosts_cached.vdf'
[2024-01-16 16:13:49] 3. https://cdn.steamstatic.com, /client/, Realm 'steamglobal', weight was 1, source = 'baked in'
[2024-01-16 16:13:49] Verifying installation...
[2024-01-16 16:13:49] Verification complete

Steam logging initialized: directory: /home/tt/.var/app/com.valvesoftware.Steam/.local/share/Steam/logs

XRRGetOutputInfo Workaround: initialized with override: 0 real: 0xeb0418f0
XRRGetCrtcInfo Workaround: initialized with override: 0 real: 0xeb0401c0
steamwebhelper.sh[141]: Runtime for steamwebhelper: defaulting to /home/tt/.var/app/com.valvesoftware.Steam/.local/share/Steam/ubuntu12_64/steam-runtime-heavy
steamwebhelper.sh[141]: Running under Flatpak, disabling sandbox
steamwebhelper.sh[141]: CEF sandbox already disabled
CAppInfoCacheReadFromDiskThread took 24 milliseconds to initialize
Steam Runtime Launch Service: starting steam-runtime-launcher-service
Steam Runtime Launch Service: steam-runtime-launcher-service is running pid 282
bus_name=com.steampowered.PressureVessel.LaunchAlongsideSteam
BRefreshApplicationsInLibrary 1: 1ms
[2024-01-16 16:15:49] Background update loop checking for update. . .
[2024-01-16 16:15:49] Checking for available updates...
[2024-01-16 16:15:49] Downloading manifest: https://client-update.akamai.steamstatic.com/steam_client_ubuntu12?t=1600271598
[2024-01-16 16:15:49] Manifest download: send request
[2024-01-16 16:15:49] Manifest download: waiting for download to finish
[2024-01-16 16:15:50] Manifest download: finished
[2024-01-16 16:15:50] Download skipped: /steam_client_ubuntu12?t=1600271598 version 1705108172, installed version 1705108172, existing pending version 0
[2024-01-16 16:15:50] Nothing to do
BRefreshApplicationsInLibrary 1: 0ms
BRefreshApplicationsInLibrary 1: 0ms
```

And it's stuck here
# #

**After shutting Steam down**

```
^C
[tt@seadragon ~]$
(steam-runtime-launcher-service:282): GLib-GIO-WARNING **: Error releasing name com.steampowered.PressureVessel.LaunchAlongsideSteam: The connection is closed

(steam-runtime-launcher-service:282): GLib-GIO-WARNING **: Error releasing name com.steampowered.PressureVessel.LaunchAlongsideSteam.Instance282: The connection is closed
Steam Runtime Launch Service: steam-runtime-launcher-service pid 282 exited
Steam Runtime Launch Service: starting steam-runtime-launcher-service
Steam Runtime Launch Service: steam-runtime-launcher-service is running pid 420
steam-runtime-launcher-service[420]: E: Can't find session bus: Could not connect: Connection refused
Steam Runtime Launch Service: steam-runtime-launcher-service pid 420 exited
src/clientdll/configstore.cpp (128) : ConfigStore (UserLocalConfigStore) is dirty, and being destroyed, we're discarding data
src/clientdll/configstore.cpp (128) : ConfigStore (UserLocalConfigStore) is dirty, and being destroyed, we're discarding data
assert_20240116162115_37.dmp[448]: Uploading dump (out-of-process)
/tmp/dumps/assert_20240116162115_37.dmp
[2024-01-16 16:21:17] Shutdown
assert_20240116162115_37.dmp[448]: Finished uploading minidump (out-of-process): success = yes
assert_20240116162115_37.dmp[448]: response: CrashID=bp-e7e7a162-0652-424f-b8e8-7c6d62240116
assert_20240116162115_37.dmp[448]: file ''/tmp/dumps/assert_20240116162115_37.dmp'', upload yes: ''CrashID=bp-e7e7a162-0652-424f-b8e8-7c6d62240116''
```
# #

Also using
**flatpak run --command=steamcmd com.valvesoftware.Steam**

```
Logging in user 'zwerckiy' to Steam Public...OK
Waiting for client config...
steamcmd has been disconnected from steam with result 3 (No Connection)
ERROR! Timed out waiting for AppInfo update.
OK
Waiting for user info...OK

Steam>
steamcmd has been disconnected from steam with result 3 (No Connection)
```
And stuck

***

### System info
```
OS: Arch Linux x86_64
Host: H610M H V2 DDR4 -CF
Kernel: 6.7.0-arch3-1
Shell: bash 5.2.21
DE: Plasma 5.27.10
WM: kwin
CPU: 12th Gen Intel i3-12100F (8) @ 4.300GHz
GPU: AMD ATI Radeon RX 6600/6600 XT/6600M
Memory: 5490MiB / 15834MiB
```

### Flatpak info

- flatpak --version
- Flatpak 1.15.6

- flatpak --gl-drivers
- default
- host

### Does this issue reproduce with native Steam
Yes