I have the same probleme…
Variation image don’t change anymore if webp express is activate….
Experienced the same problem and found a somewhat temporary solution.
Go to WebP Express Setings > Alter HTML > Select “Use content filtering hooks (the_content, the_excerpt, etc)” under How to Replace > Save.
Fixed the issue for me.
Not sure if some images may then not be served as webp but various speed tests report the same improvement as using the “Use content filtering” or “The complete page” settings.
Ideally the compatibility issue between WebP Express and WooCommerce could be fixed soon so the “The complete page (using output buffering)” option could be selected.
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This reply was modified 5 years, 2 months ago by
Dominiko.