Hi Partner,
I followed the following steps to try to reproduce your problem:
1.I designed an email with two buttons attached, both using the same event.
2.Click on each of the two buttons when I receive the email.
1)Clicking on the "Add to Calendar Button", the browser would automatically download the file,
open the file outlook automatically created a draft of the appointment for me:
2)Click on the Event button and I'll be automatically redirected to the event page:
Apparently everything is fine, if you have any other steps please elaborate.
In fact, there is no official documentation on this feature, and in my testing it didn't have any effect if I didn't enable the 'Enable events creation in real-time marketing' feature,
So if turning on this feature affects your usage it is recommended that you turn it off.
Best Regards,
Haig Liu