Scanner freezes completely on launch

Hi,

I'm experiencing a reproducible freeze when opening the card scanner. The app becomes fully unresponsive - no crash without the developer setting to force crash on no reaction and no error message. The only way to recover is to force-close the app via the recent apps switcher or App Info > Force Stop.

What I've already ruled out:

• Cleared app cache and force-stopped/relaunched the app

• Verified Camera and Files/Media permissions are granted ("Allow" / "Allow only while using the app")

• "Show pop-up windows while running in background" special permissions (HyperOS-specific)

• Set battery usage to "No restrictions"

• Tested the stock camera app separately – works fine

• Disabled MIUI Optimization in Developer Options and rebooted – no change

• Set a default gallery/photos app – no change

Reproducible pattern: The scanner opens reliably only when I launch the app immediately after a full device reboot and go straight into the scanner. On any later attempt in the same session (no reboot in between), the scanner hangs on open every time.

Since there appears to be no logging exposed to me and rather the application not even realizing it hangs, I am at a loss on what troubleshooting I can provide further to reign the error in. Without message, pop-up, log I don't see myself finding a setting that influences the behavior.

I am not a power user so restarting is workable for me, but maybe there is something to ease the pain at least.

For completness sake, two pictures. One where the app hangs when no permisisons are granted. Both continue and the return button are nonreactive. The other where it hangs with permissions granted (and me messing with dev-options in hopes to find ANYthing). The return button is still not reacting. On the latter the animation works fine, until the app was minimized and restored once, then it also hangs.

Device info:

• Phone model: Xiaomi Poco F5 (12GB RAM, Snapdragon 7 8 Core @ 2,91Ghz)

• Android version: 15 AQ3A.250226.002

• HyperOS version: 3.0.4.0.VMREUXM

• CardNexus app version: 0.9.44

• Installed via Play Store