In the web app, some of my photos incorrectly show the "panorama" icon and render with a spherical projection. Edit: Only photos taken by our wedding photographer show up this way, and they seem to be the only photos with camera metadata. As far as I can tell, all of these photos have "lens model" and "projection" exif data because they were taken and tagged by a professional photographer. I have found resources for correcting missing exif data, but no way to get immich to display images with lens data as normal photos.
*Solution: Using exiftool, I removed the "Projection Type : equirectangular" value from the assets. *