Incredibly slow performance CRM Zoho

Incredibly slow performance CRM Zoho

We are experiencing long delays upon updating customer records in zoho crm, this generally starts in the afternoon and is becoming quite unbearable for our staff.

I have validated that the internet connectivity is sufficient, we are able to stream 1080p videos without problem on our 20 meg connection. But after pressing the save button when editing a client record we are faced with 30 second to 1 minute wait times.

Is there any advice or diagnostic advice you can help us with?