For this config i am currently connected through VPN (from different location than my network) ,PPPoE Wan is connected, ether1 WAN is disconnected and the problem mentioned above occurs.
I consored my public addresses (every xx, yy, zz means different digits).
/ip address print detail
Flags: X - disabled, I - invalid, D - dynamic
0 address=10.2.0.1/24 network=10.2.0.0 interface=bridge-LAN actual-interface=bridge-LAN
1 address=10.10.10.1/24 network=10.10.10.0 interface=bridge-Garage actual-interface=bridge-Garage
2 address=192.168.10.1/24 network=192.168.10.0 interface=bridge-Guest actual-interface=bridge-Guest
3 address=XX:XX:XX.90/30 network=XX:XX:XX.88 interface=ether1 actual-interface=ether1
4 D address=YY:YY:YY/32 network=ZZ:ZZ:ZZ.1 interface=PPPoE_Client actual-interface=PPPoE_Client
5 D address=10.2.0.1/32 network=10.2.0.196 interface=<l2tp-vpnuser> actual-interface=<l2tp-vpnuser>
/ip route print detail
Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, b - bgp, o - ospf, m - mme,
B - blackhole, U - unreachable, P - prohibit
0 S dst-address=0.0.0.0/0 gateway=XX:XX:XX.89 gateway-status=XX:XX:XX.89 unreachable distance=1 scope=30 target-scope=10
1 ADS dst-address=0.0.0.0/0 gateway=PPPoE_Client gateway-status=PPPoE_Client reachable check-gateway=ping distance=1 scope=30 target-scope=10
2 ADC dst-address=10.2.0.0/24 pref-src=10.2.0.1 gateway=bridge-LAN gateway-status=bridge-LAN reachable distance=0 scope=10
3 ADC dst-address=10.2.0.196/32 pref-src=10.2.0.1 gateway=<l2tp-vpnuser> gateway-status=<l2tp-vpnuser> reachable distance=0 scope=10
4 ADC dst-address=10.10.10.0/24 pref-src=10.10.10.1 gateway=bridge-Garage gateway-status=bridge-Garage reachable distance=0 scope=10
5 DC dst-address=XX:XX:XX.88/30 pref-src=XX:XX:XX.90 gateway=ether1 gateway-status=ether1 unreachable distance=255 scope=10
6 ADC dst-address=192.168.10.0/24 pref-src=192.168.10.1 gateway=bridge-Guest gateway-status=bridge-Guest reachable distance=0 scope=10
7 ADC dst-address=ZZ:ZZ:ZZ.1/32 pref-src=YY:YY:YY gateway=PPPoE_Client gateway-status=PPPoE_Client reachable distance=0 scope=10