Someone has tagged a photo of me on the IMDb page of a film I am in but it's not showing up on my own page?

Yes, that is correct. From https://contribute.imdb.com/help/201989690I added an image to my favorite title, making sure to tag all the actors in the photo. The image appears on the title page but not on the actor's page. Is this correct?Yes, user supplied title images are only visible on title pages. They will not appear on name pages. Adding images to name pages requires an IMDbPro subscription. To learn more, please see Adding photos to IMDb.To add photos to your name page, an IMDbPro subscription is required. Please see http://www.imdb.com/help/show_leaf?addphoto

I have an IMDb Pro subscription. Is it simply a case of re-adding the photo's to my profile? Or is there an easier way, such as a tagging process that does this automatically?