If your design in Meta ads is changed, and differs from the one made in Confect, these settings may be causing it.
You can find all these on the ad level inside the Ads Manager.
Find these "Advantage+ creative" settings on the ad level, and make sure they are turned off. These settings can adjust the image, creating undesirable outcomes.
These may include:
(If you are using the Story catalog function in Confect, only the "Adapt to placement" option may be turned on - all other settings should be off)
Also, click "Edit creative" under "Ad creative" and make sure there are no undesirable effects added.
These may include:
Image cropping
Frames
Different labels and tags on the image
Remove these by selecting "None".