Your system information

• Steam client version (build number or date): 1.0.0.85-1
• Distribution (e.g. Ubuntu): Arch Linux
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes
• Steam Logs: steam-logs.tar.gz
• GPU: NVIDIA

Please describe your issue in as much detail as possible:

When I close a game with Steam Networking it crashes steam along with it. Only started happening recently and only with a select few games, all of which share that they use Steam Networking.

Opening Steam in a terminal shows that when I open the game
src/steamnetworkingsockets/clientlib/csteamnetworkingmessages.cpp (421) : Identity isn't valid for Messages sessions.
is spammed throughout the entire time I play. Below is output when I close the game.

Game Recording - game stopped [gameid=3146520]
Removing process 13356 for gameID 3146520
Removing process 12898 for gameID 3146520
Removing process 12734 for gameID 3146520
Removing process 12692 for gameID 3146520
Removing process 12668 for gameID 3146520
Removing process 12661 for gameID 3146520
Removing process 12656 for gameID 3146520
Removing process 12647 for gameID 3146520
Removing process 12644 for gameID 3146520
Removing process 12642 for gameID 3146520
Removing process 12639 for gameID 3146520
Removing process 12638 for gameID 3146520
Removing process 12637 for gameID 3146520
Removing process 12627 for gameID 3146520
Removing process 12588 for gameID 3146520
Removing process 12357 for gameID 3146520
Removing process 12356 for gameID 3146520
Removing process 12355 for gameID 3146520
crash_20260109154609_35.dmp[13407]: Uploading dump (out-of-process)
/tmp/dumps/crash_20260109154609_35.dmp
/home/citwus/.local/share/Steam/steam.sh: line 928: 11764 Segmentation fault         (core dumped) "$STEAMROOT/$STEAMEXEPATH" "$@"
[citwus@granite ~]$ crash_20260109154609_35.dmp[13407]: Finished uploading minidump (out-of-process): success = yes
crash_20260109154609_35.dmp[13407]: response: CrashID=bp-c3f30c5e-601c-42ed-94a3-600592260109
crash_20260109154609_35.dmp[13407]: file ''/tmp/dumps/crash_20260109154609_35.dmp'', upload yes: ''CrashID=bp-c3f30c5e-601c-42ed-94a3-600592260109''
src/common/pipes.cpp (902) : stalled cross-thread pipe (pipe is disconnected).
01/09 15:46:10 Init: Installing breakpad exception handler for appid(gameoverlayui)/version(1.0)/tid(12774)
assert_20260109154610_8.dmp[13421]: Uploading dump (out-of-process)
/tmp/dumps/assert_20260109154610_8.dmp
src/clientdll/steamclient.cpp (854) : bufRet.TellPut() == sizeof(uint8)
01/09 15:46:10 Init: Installing breakpad exception handler for appid(gameoverlayui)/version(1.0)/tid(12774)
assert_20260109154610_11.dmp[13425]: Uploading dump (out-of-process)
/tmp/dumps/assert_20260109154610_11.dmp
assert_20260109154610_8.dmp[13421]: Finished uploading minidump (out-of-process): success = yes
assert_20260109154610_8.dmp[13421]: response: Discarded=1
assert_20260109154610_8.dmp[13421]: file ''/tmp/dumps/assert_20260109154610_8.dmp'', upload yes: ''Discarded=1''
assert_20260109154610_11.dmp[13425]: Finished uploading minidump (out-of-process): success = yes
assert_20260109154610_11.dmp[13425]: response: Discarded=1
assert_20260109154610_11.dmp[13425]: file ''/tmp/dumps/assert_20260109154610_11.dmp'', upload yes: ''Discarded=1''

Steps for reproducing this issue:

1. Open Steam
2. Open a game with Steam Networking
3. Close the game
4. Steam window stays functional for ~5 seconds
5. Steam window goes black (unsure if this is my WM doing it)
6. Steam hard crashes, tray icon disappears in waybar