I was about to post this, so I’m putting it here:
I (also) suggest that when the ID for an observation changes we ‘flag’ any taxon pages containing images from that observation for a curator to see if it should be changed.
I regularly check the details of the images on taxon pages and I often find the photos are of a different species. Yesterday I found Eriophyes sorbi has only one taxon photo, which turned out to have be misidentified 3 years ago and a year or so later got a new ID. So this taxon has an image of the wrong species for about 2 years.
I also found that Canadian Bunchberry had an image of a Western Bunchberry for years.
It’s mostly an issue with more obscure species but it’s kind of eveywhere when you start to check.