dnsproxy: HTTP3 upstream memory leak

RAM USAGE too much after running 2 hours.

systemctl status adguard-dnsproxy
● adguard-dnsproxy.service - dnsproxy
     Loaded: loaded (/etc/systemd/system/adguard-dnsproxy.service; enabled; vendor preset: enabled)
     Active: active (running) since Wed 2022-11-02 15:16:50 WIB; 2h 43min ago
       Docs: https://github.com/AdguardTeam/dnsproxy#readme
   Main PID: 27947 (dnsproxy-helper)
      Tasks: 10 (limit: 2359)
     Memory: 1.2G
        CPU: 22min 44.463s
     CGroup: /system.slice/adguard-dnsproxy.service
             ├─27947 /bin/sh /opt/adguard/dnsproxy-helper.sh start
             └─27973 /opt/adguard/dnsproxy --listen=127.0.2.1 --config-path=/etc/adguard/dnsproxy.yml

python3 ps_mem.py
 Private  +   Shared  =  RAM used	Program

  4.0 KiB +   0.5 KiB =   4.5 KiB	dhclient
  4.0 KiB +   0.5 KiB =   4.5 KiB	unattended-upgr
  4.0 KiB +   1.5 KiB =   5.5 KiB	dnsproxy-helper
  8.0 KiB +   1.0 KiB =   9.0 KiB	agetty (2)
 28.0 KiB +   8.5 KiB =  36.5 KiB	dbus-daemon
 32.0 KiB +  16.5 KiB =  48.5 KiB	polkitd
 44.0 KiB +   8.0 KiB =  52.0 KiB	chronyd (2)
100.0 KiB +   5.5 KiB = 105.5 KiB	systemd-udevd
132.0 KiB +  32.5 KiB = 164.5 KiB	cron
108.0 KiB +  64.5 KiB = 172.5 KiB	systemd-resolved
112.0 KiB +  78.5 KiB = 190.5 KiB	systemd-logind
260.0 KiB +  18.5 KiB = 278.5 KiB	packagekitd
364.0 KiB +  63.5 KiB = 427.5 KiB	vnstatd
496.0 KiB +  30.5 KiB = 526.5 KiB	rsyslogd
560.0 KiB + 229.5 KiB = 789.5 KiB	systemd (3)
  1.2 MiB + 118.5 KiB =   1.3 MiB	bash
  4.3 MiB + 679.5 KiB =   4.9 MiB	nginx (3)
  7.9 MiB + 225.5 KiB =   8.1 MiB	systemd-journald
  3.0 MiB +   6.2 MiB =   9.2 MiB	sshd (5)
338.6 MiB +   0.5 KiB = 338.6 MiB	nginx-rc
  1.2 GiB +   0.5 KiB =   1.2 GiB	dnsproxy
---------------------------------
                          1.5 GiB
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