SharePoint image caching (OOTB components)

[salascz (salascz)]

Hello,
the image caching in SharePoint does not seem to be well described (or I am not able to find proper resources)...

Is here someone who knows how it works?

My steps should be easy to reproduce:

• create a image in library (e.g. Site Assets)
• create a page, include "Image" web part and link the image created in previous step
• return to the library and override the image file with different image
• return to the page - the web part shows the old image for "hours"

It looks the images are stored in browser cache as a blobs - the url in "inspect" is replaced with a format blob://[domain]/[guid]

It is a bit annoying - I was building a solution based on SharePoint pages, using a mix of OOTB and custom web parts. The solution depends on various images (stored in libraries). In my case - user might need to update images => it would be easier to update just the files (keeping the same name) that force users to use different file names (and search for all instances across multiple pages...)
I could use some timestamp for images in my custom web parts, but it would solve just a part of the problem.

Thanks