Syncthing generatin a lot of DNS queries even if sync job are disabled

I am using Syncthing and also have Pihole running on an separat machine (on a Banana Pi). I notice that the OMV machine (Syncthing) is generating a lot of queries to something like discovery-v6-3.syncthing.net
For Syncthing I have set up an sync job but it is disabled so I don't understand why the OMV machine is constantly generating queries trying to get to discovery-v6-3.syncthing.net
Can someone please explain?

Thanks.

Ok thanks for the reply.
It was strange why syncthing try to contact a discovery server even if the sync job is disabled or has no sync job.

I uninstalled the Syncthing plugin and my OMV nas still try to get something from apt.syncthing.net
Also OMV is trying to get something from downloads.plex.tv, but I never had Plex installed on my system.

Tryed: apt-get remove syncthing but get Package 'syncthing' is not installed, so not removed

Same for: apt-get remove openmediavault-syncthing

I now also disabled the syncthig repo and so quering to syncthing.net stoped.

@subzero79
Thanks for you time and explanations.