PPPoE dropping connection

Hey guys.
I got my RB751G a few days ago and I ran into some issue.
My PPPoE connection is always dropping at a very specific time (18:08:xx). It is not a 24h disconnect triggered by my ISP since I am rebooting the device every night and I reconnected to PPPoE at different times a day to rule that out.

This is my config:

Flags: X - disabled, R - running
0 name=“pppoe-out1” max-mtu=1480 max-mru=1480 mrru=disabled
interface=ether1-gateway
user=“xxx” password=“xxx”
profile=default service-name=“” ac-name=“” add-default-route=yes
dial-on-demand=no use-peer-dns=yes allow=pap,chap,mschap1,mschap2

Could you point me in the right direction?