Synology NAS with ZT, breaks Directory server services

Hello, I installed ZT on my DS1621+ synology NAS, with firmware DSM 7.2.2-72806 Update 3 version.
ZeroTier works as great. I can see and start/stop the container in container manager. Thing is I have the following services also: Directory Server (synology’s samba domain controller implementation), and DNS server (both for name resolving for all machines and for the domain controller).
The issue is that when the ZT container is ON and working, users can’t resolve DNS and hence, can’t login to the windows domain.
I followed the exact steps for the installation of ZT via CLI. The one difference is that the TUN device was already present. Anyway, I installed and it worked. Found out about the issue next day when none had access to internet or couldn’t login.
Any insights on this problem or how to solve it?
Thank you all!