Received this response:

We apologies for inconvenience.We have transfer data of this server to another higher configuration server, After transfer DNSBOX15 will be more powerful. Transfer process is working on it, & it will be complete within 24 hours.Some time its load suddenly increases.it causes downtime.

Thanks
Ambrish Pachori
YRHost Team

From what I can tell in WHM, the machine has yet to be upgraded, although service has improved regardless. Working in the WP backend is much faster, and site loading times have decreased significantly.