Lightroom web - aspect ratios not displayed correctly

[jlw97]

I edit photos in Lightroom Classic and share them for team review in a browser via lightroom.adobe.com. I have ONE gallery (my most recently created) in which aspect ratios are not being respected: They always display at the original 4:3 proportions, causing cropped images to appear distorted. Other albums are not affected, and this one was not affected until recently. Suggestions?