Tvheadend

Hi,

I've got two TVHeadend servers with a different set of channels on each, so to share them I've added each server on the other as an Automatic IPTV Network (using the /playlist/auth/channel url), which works great.
However they're both endlessly running the EPGGrab on every channel on a loop, never stopping. They are both getting the guide from the other's channel so it is working, but it's endlessly using a tuner on each for no reason.

Plus on the remote server the scan isn't showing as an epggrab, it looks like a regular stream so the tuner is blocked if a local user wants to use it, unlike a local epggrab which gives way to users.
Both TVHeadend servers are running in docker on unraid, if that matters.

Is there a way to limit them to one or two scan a day, like it does by default on DVB networks ?
Thanks