Memory consumption going up and down daily

[CJ]

To be fair, Home Assistant didn't entirely stopped trying since I switch to "block", but it stopped generating Mbps of traffic at least. It seems the "reject" got him in a loop.

I still don't know why it was doing this. I have the cloudflared plugin and thought it was the reason, but disabling the plugin doesn't stop this lookups from happening. Now that I think about it, I should have restarted HA on top of disabling the plugin probably...

I would wager that HA is still in the same loop.  It's just that Reject provides immediate feedback that the query failed while Block has to wait for the timeout to occur.