I’m trying to set up the custom DNS settings, but my domain registerer doesn’t allow blank fields for the “name” space for the A record.
Should I just use @ ??
after an hour, on DNS checker & Bubble, no servers around the world have propagated the domain. 
I deleted my CNAME record because it used wwwas the name which conflicted with the required www name 2 of the 4 A records required as per Bubble.
Any ideas would be much appreciated!!