Hello @kekwoot,
When we checked the theme locally we are unable to find such issue.
The product image is displaying fine in both shop page and single product page as you can see in below screenshot:
https://image.prntscr.com/image/G23dK4t0RI_N7PZtVJ-2VQ.png
https://image.prntscr.com/image/cmRlNA7kQ3qQDHr3n3BxHQ.png
The issue might have caused due to use of third-party plugin which may not be compatible with the theme.
So please once try deactivating the third-party plugin and verify the issue. If the issue still persists then please post your site URL so that we could inspect further.
Hope this helps.
Best Regards!!
Have a good day 🙂 .