Some calendar invites dont show accept button in Zoho mail

Some calendar invites dont show accept button in Zoho mail

Hi,

This is becoming a big issue for me and stopping me using zoho mail.

for some calendar invites I'm sent from customers, I don't have any button or anything to ACCEPT the invite and have it added to Zoho calendar. if I open the same email in outlook or gmail, it shows the accept button just fine but then it only adds it to gmail calendar which then has no way of adding the same event to zoho calendar.

this is a huge problem for me so what's the fix for it ? it means I can't use one email platform for my work as Zoho is unreliable compared to Gmail/outlook.