You can avoid uploading the same photo twice. Most database or CMS setups let you reference an image that’s already in your media library. Usually, you just need the file’s URL reuse it wherever you need it.
If you share what platform you are using, I can guide you with the exact steps!
The issue with the ACF image field is usually caused by a conflict with another plugin or the theme, or the site is showing an old cached version. The best way to troubleshoot is to turn off all other plugins and check if the field works, then turn them back on one by one to spot the problem.
