Game crashes if it loses focus

[slow saffron]

Alt-tab, windows key, et cetera... If I'm ever not focusing on the game for even a second, it'll crash. Just pressing alt-tab closes it.

[spark coral]

Thank you for reporting this bug! Our team will review your report soon.
Feel free to add more details in follow-up messages — we're also scanning for duplicate reports automatically now.
📨 There are currently 43 reports awaiting team review. Due to the high volume, it may take a little longer for us to get to yours.

📋 Log files help us investigate issues. You can find yours here:
• Windows: %USERPROFILE%\AppData\LocalLow\tobspr Games\shapez 2\Player.log

💾 Savegame files (.spz2) are very helpful if relevant to the issue!
Export via Main Menu → Play → click the download icon on the relevant savegame.
You can also find them here:
• Windows: %USERPROFILE%/AppData/LocalLow/tobspr Games/shapez 2/

1. [SPZ2-6003] — 🔥 92% similar

Linux: Crash when losing focus if in full screen or borderless mode
To Do • Priority: Highest • Fix: Probably Never • Game: 6.5.5

On Linux (KDE Plasma and Ubuntu), shapez 2 crashes instantly when the game loses focus while in fullscreen or borderless screen mode. This is triggered by Alt-Tab, the Windows key, or clicking outside the game window. The crash occurs immediately upon focus change, stopping the game entirely. The expected behavior is that shapez 2 should continue running regardless of screen mode when focus is lost. The issue was previously observed on Bazzite but has since resolved there for unknown reasons.
💬 Threads: [0.1.1] Linux - Game crash on FN key pre

2. [SPZ2-3849] — ✨ 75% similar

Minimize Game with Vulkan Crashes game
Done • Priority: High • Fix: None • Resolution: Won't Fix

When playing shapez 2 in windowed mode at 1680x1050 resolution using the Vulkan graphics backend, minimizing the game window causes an immediate crash. The player normally uses borderless mode but was testing the minimize functionality in windowed mode. The crash does not occur when using DirectX. This appears to be an engine-level issue with Vulkan's handling of window minimization in windowed display mode.
💬 Threads: [0.0.9-xmas] Minimize Game with Vulkan C

3. [SPZ2-4453] — 👀 65% similar

One time crash when pausing with 'P' and minimizing game
Done • Priority: Medium • Fix: None • Resolution: Cannot Reproduce

A player experienced a one-time crash to desktop when pausing shapez 2 using the keybinding 'P' and then minimizing the game window to search the Wiki in their browser. The crash occurred without warning and the player could not reproduce it afterward. Log analysis revealed a fatal Mono runtime error and a native fault reporting error, but insufficient data was available for full diagnosis. The development team attempted multiple reproduction attempts across different builds but could not rec...
💬 Threads: [0.0.9-RC7] Crash (SIGSEGV?)

4. [SPZ2-2190] — 👀 55% similar

MacOS 14.2, Game unresponsive when switching tasks
Done • Priority: High • Fix: 4 - Early Access • Resolution: Done

On MacOS 14.2, shapez 2 becomes unresponsive when switching between applications. When the player switches away from the game to another task and then returns, shapez 2 hangs and must be force-quit. This happens almost immediately upon returning to the game window. The issue was caused by a Unity engine bug and has been reported by multiple users. It should be resolved after the Unity version downgrade.

5. [SPZ2-3645] — 👀 45% similar

[0.0.8-rc3] Crash while loading save if Steam/Game was half closed - System.NullReferenceException
Done • Priority: High • Fix: Version 0.0.9 • Game: 0.0.8-rc3 • Resolution: Won't Fix

When a player closes Steam while shapez 2 is running, then prevents Steam from shutting down the game and continues playing, attempting to load a Savegame afterward causes a System.NullReferenceException crash. The crash occurs when clicking "Continue" from the Main Menu after this Steam-closing sequence. The game becomes completely unresponsive and requires force closing. This is a Steam SDK-specific issue that cannot be fixed by the game developers. The issue is reproducible by following th...

6. [SPZ2-2587] — 👀 40% similar

Game minimizes when going out of focus in full screen (DX12)
Done • Priority: Medium • Fix: 4 - Early Access • Resolution: Done

shapez 2 minimizes when losing focus in exclusive fullscreen mode on DX12. The issue occurs when using the Windows key or alt-tabbing out of the game, but does not happen in borderless or windowed modes. Unity's implementation always minimizes when focus is lost in exclusive fullscreen, making QA testing difficult as Windows screenshot tools also trigger minimization. The behavior is inconsistent and may be related to swapchain resizing. Testing shows the issue persists on both DX11 and DX12 ...

Found 6 similar reports • Searched 3,618 reports • Use /check-duplicates to recheck

[timid wren]

Try Borderless (if you are on windows) window Mode

[pure crest]

Is this Linux? Only work arounds at this point is to use proton or windowed mode.

[frigid sigil]

can't speak for original poster but I am on linux and this happens for me