We have tried to install previous versions and this does not seem to be a problem. Please indicate what might cause such a problem and what needs to be done to solve it.
We installed OpenCart version 18.104.22.168 and this version seems to have a cache problem. When we try to download an image from Catalog >> Products, it does not show the downloaded image instantly, but the image has already been downloaded. The same goes for deleting files without the instant update. It takes a while to update.