Tags in email notifications not translating

When I do an individual registration the notification emails show the tags correctly but when I do a group registration the notification email does not translate the tags correctly even though it seems to store the correct names in the data saved. See attached JPG

Hello Peter

Look like you don't have first_name and last_name fields enabled on group billing information step and it causes the issue

Go to Events Booking -> Custom Fields, edit the two custom fields, set Display In to All

After that, check it again. It should work

Tuan