Normally, I don't block TLD's as it needs 'huge' quantity of resources.
But ok, let's test :
I tried blocking the tld "today" :
dfaf9bb0-5f17-4176-bdad-c7b2b0fc5fcd-image.png
A test :
C:\Users\Gauche>nslookup 1618250475.site.goapp.today
Serveur : pfsense.brit-hotel-fumel.net
Address: 2001:470:1f13:5c0:2::1
Nom : 1618250475.site.goapp.today
Address: 10.10.10.1
Which means :
1f43da52-b94a-4dfc-a72e-ca841ad3ed91-image.png
Btw : i's very rare to see this "black screen", as no one is (should not) using http:// any more.