Massive slowdown of DNS management

We use DNS management to redirect expired customers to a static webpage. In the last few weeks, we’ve noticed that searching for a DNS name can take over 10 seconds. If we then edit the content, this can also take between 5 - 10 seconds to save.

Is this referring to searching within the dashboard for a specific record?

I’m selecting our domain first, and then using the ‘DNS’ link from the list of tools on the left. I then enter part of the name and press or click ‘Search’. The delay is between pressing and the record being displayed.