Why should this be happening?

This is not the first time this has happened. I have my site up and running after many times of the images unexplainably disappearing. I reconnect them and update the site to the server. All appears well on the server. However, now today when I go to do some additions to the site all the images have once again disappeared. Instead I have just a box with the name of the images which should be in their place. One image will only show in preview mode but not on the full view. I take backups continually but when I open them the same thing happens. No images showing. This is extremely annoying to say the least and I’m at the point that I will seriously consider not using Blocs again when I need to do a full renewal of our site in the future. Fortunately for me, I don’t have hundreds of pages to keep reconnecting images. Disappointed to say the least.

PS and now it won’t let me save my project

Happens to me from time to time, however, if I publish it, they seem to be all there, without relinking them.
So it’s not a great hassle, just more of an annoyance for me.