The Safari browser for the PC is old and there are many issues relating to this browser now, security is compromised and there are glitches with it.

We do not recommend you use Safari browser for a PC. 

Safari browser on a MAC works fine as they keep this version of browser updated and there are no issues at all.

For the best experience to run your CRM account we recommend your use Google Chrome, Firefox or Microsoft Edge browsers - they are fast and always kept up to date.