Get image with api takes to long for actievepieces cant save

I just get an image via API from bluepics, if i test it, it works fine, but i get the error, that there is a network issue (the request just takes about 3 seconds and i get the correct output).
It looks like this:

after 10 minutes it still load the save button on the upper right. if i click on refresh the picture isnt there anymore, so that doesnt help to.
What can I do or how can I get through this bug.