Zoho desk is slow on Mac but not on iPhone

Zoho desk is slow on Mac but not on iPhone

Hello dear Zoho team,

We started using Zoho Desk in August, and it has been very slow since. For example, it can take up to several seconds for openning an email in a ticket. However, I noticed that it is very fast on the iPhone app. 

My IP address is 77.231.127.106 
Our domain (I guess) is filoventzohosupport.com

François Lillet
Filovent