Battle Net Desktop App disconnecting / revconnecting every minute

Since yesterday i have the following problem:
Bnet App disconnects and reconnects every couple of minutes. This also leads to disconnects in WoW ( WOW51900319 error).
I have tried following:

  • disable background apps
  • reinstalled bnet desktop app
  • check hosts file
  • disabled firewall
  • restart the router
  • Renew your IP
  • Flush your DNS

Here is the looking glass test i take under: eu-looking-glass.battle*net/
with the option Bnet authentication:

TRACEROUTE:
traceroute to 185.22.143.102 (185.22.143.102), 15 hops max, 60 byte packets
1 Blizzard Blizzard 0.408 ms 0.397 ms 0.394 ms
2 37.244.24.3 (37.244.24.3) 0.627 ms 0.774 ms 1.065 ms
3 Blizzard Blizzard 1.508 ms 1.601 ms 1.669 ms
4 137.221.66.46 (137.221.66.46) 0.981 ms 0.989 ms 1.029 ms
5 137.221.78.88 (137.221.78.88) 1.321 ms 1.333 ms 1.332 ms
6 137.221.78.34 (137.221.78.34) 1.222 ms 1.268 ms 1.238 ms
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *

23/03/2020 13:59:35 UTC

PING:
PING 185.22.143.102 (185.22.143.102) 56(84) bytes of data.

— 185.22.143.102 ping statistics —
4 packets transmitted, 0 received, 100% packet loss, time 2999ms

23/03/2020 13:59:35 UTC

MTR:
Start: Mon Mar 23 13:59:35 2020 Blizzard 1.|-- Blizzard 0.0% 10 0.2 0.3 0.2 0.4 0.0
2.|-- 37.244.24.3 0.0% 10 0.4 0.7 0.4 1.6 0.0
3.|-- Blizzard 0.0% 10 1.3 1.4 1.2 1.9 0.0
4.|-- 137.221.66.46 0.0% 10 0.6 1.2 0.5 6.3 1.7
5.|-- 137.221.78.88 0.0% 10 1.0 4.1 1.0 12.8 4.3
6.|-- 137.221.78.34 0.0% 10 1.2 5.3 1.1 25.5 8.4
7.|-- ??? 100.0 10 0.0 0.0 0.0 0.0 0.0

23/03/2020 13:59:35 UTC

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