ERR_CONNECTION_RESET on first website visit

[uragiristereo]

Please read contributing guidelines. Thanks.

Describe the bug
Everytime i visit a site it will be error connection reset on first time, then works normally after reloading several times. Also images sometimes could not loaded properly.

To Reproduce
Steps to reproduce the behavior:

1. Connect to any server with UDP Fallback
2. Visit any site
3. See error ERR_CONNECTION_RESET (see Screenshot 1)
4. Site works normally after reload once but images not loaded properly (see Screenshot 2)

Expected behavior
Site and images loaded properly.

Screenshots
(Screenshot 1)

(Screenshot 2)

Smartphone (please complete the following information):

• Android/Chrome OS version: Android 10 Q & Chrome v79
• Device: Xiaomi Mi A2
• Version: v5.2.4
• Last version that did not exhibit the issue: 5.2.2

Configuration
Put an x inside the [ ] that applies.

• IPv4 server address
• IPv6 server address
• Client IPv4 availability
• Client IPv6 availability
• Encrypt method: chacha-ietf-poly1305
• Route
  • All
  • Bypass LAN
  • Bypass China
  • Bypass LAN & China
  • GFW List
  • China List
  • Custom rules
• IPv6 route
• Apps VPN mode
  • Bypass mode
• Remote DNS: dns.google
• DNS over UDP
• Plugin configuration (if applicable):
• Auto Connect
• TCP Fast Open
• If you're not using VPN mode, please supply more details here:

Additional context
I think it's because of the new DDNS feature. Downgrading to v5.2.2 works fine.
Sorry for my bad report this is my first time doing opening issue in GitHub.

[Mygod]

🤔 Android should have built-in DNS cache: https://android.googlesource.com/platform/bionic/+/android-5.0.0_r1/libc/dns/resolv/res_cache.c

I guess it is likely that custom ROM could improperly implement the cache.

[uragiristereo]

Thank you for the response. My friend also had the same issue. He use Samsung Galaxy S21 with OneUI 3.

[Mygod]

Dup #2751.