Image getting replaced but not thumbnails

Hi the plugin is working but when you replace the image is clearly replaced but thumbnails are not, you have to manually clear cache in order to thumbnails display the correct image.

Thumbnails arent showing by clearing cache via plugin how i can i solve it, i cant tell my costumer to manually clear their cache. If you access the image url the image i really replaced but not woocomerce, media and post thumbnails etc.

2 videos demsostrations any tip will be helpful, i contacted hosting provider and everything seems to be fine i deactivited varnish and everything and nothing help.

https://youtu.be/CpkB59mTdTg
https://youtu.be/UFf8kX4b9hE