I have no problems with posting and inserting images, but have strange behaviour of my server.
CSP prefer “self” images, scripts etc.
When I insert the image to the post, it isn’t displayed on the post edit page (get error about CSP in browser console - screen below) - but the image is inserted. However, when I close the post edit page and go back to this edit page again, the image is displayed (and no error in the console).
My CSP setting is: img-src data: ‘self’
What should I chage in CSP, so the image is displayed just after inserting it to the post?
I have no problems with Featured Image.