BUG: Iptables rules are not applied properly for all apps

[walrus543]

What happened?

When using de1984 with iptables as the backend firewall, one of my app (package name ml.docilealligator.infinityforreddit.plus) doesn't have Internet access.
If I just switch to VPN as the backend firewall, the app has access to Internet.

I noticed errors in the log:

2026-01-21 14:30:15.779 E/IptablesFirewall: Failed to delete custom chains
kotlinx.coroutines.JobCancellationException: Job was cancelled; job=SupervisorJobImpl{Cancelling}@86c2a56
2026-01-21 14:30:15.780 D/De1984Error: handleError: Re-throwing CancellationException for operation: delete iptables chains
2026-01-21 14:30:15.781 E/IptablesFirewall: Failed to delete iptables chains
kotlinx.coroutines.JobCancellationException: Job was cancelled; job=SupervisorJobImpl{Cancelling}@86c2a56
2026-01-21 14:30:15.782 D/De1984Error: handleError: Re-throwing CancellationException for operation: delete iptables chains

Steps to reproduce

I don't know why I have this issue with this specific app only.

• Set iptables as the backend firewall of De1984
• Allow Internet for the app
• Run the app
• Return to De1984 and switch the backend to VPN
• Run the app again

What did you expect to happen?

The app should have access to Internet with all backends.

Logs

n_de1984_logs_20260121_143054.txt

Device information

• Device: OnePlus 8 Pro
• Android 16 (LineageOS 23.0)
• De1984 v2.6.2
• Root access: yes (Magisk 30.6)