I been currently using your temporary hosting domain blueelephant.wpmudev.host which I rebuilt my website under maintenance screen, up to this point everything has been fine, on Friday evening I cancelled by current hosting provider due being in honeymoon period plus also there service response time was crap avg 2300ms.
After cancellation I reset nameservers at hover to there default ns1.hover.com and ns2.hover.com redirecting my domain back to hover, then completed the DNS configurations to point my domain at WPMUDEV and everything appeared to work a treat and straight forward.
This is issue I have now is Up-time monitoring detection it appears my site is up and down like a YoYo, currently have ton of reports it appears to go offline 4x per hour for several minutes, attached screenshot for ref. For you ref I deleted all WPMUDEV plugins and reinstalled them still problem exists, in addition reading other support tickets tried Pingdom test also nothing showing here, attached screenshot too, plus not using any other caching plugins.
Only other thing I can think I have set my domain blueelephant.blue to primary domain which is normal, but when I configured Hover and WPMUDEV to add domain it added additional domain register http://www.blueelephant.blue even though during process I only specified blueelephant.blue, not sure if this could be interfering?