Why the automated deployment from GitHub to DigitalOcean, will change the image urls in my RubyOnRails app?

I have Ruby On Rails (version 6) app deployed in DigitalOcean, I am using ActionText for the images, the images are stored in DOSpaces.

I display them in the following way in file _blob.html.erb <%= image_tag "https://bucketname.ams3.cdn.digitaloceanspaces.com/#{blob.key}", width:"75%" %>.

So the problem is every time when I push new changes to GH, and automated deployment to DO is finished, the image URLs are changing from https://bucketname.ams3.cdn.digitaloceanspaces.com/eervq9p7jvgib1xv5b3gn3yznw7h

to

https://bucketname.dev/rails/active_storage/blobs/eyJfcmFpbMHiOnsibWVzc2FnZSI6IkJBaHBJdz09IiwiZXhdIjpudWxsLCJwdXIiOiJibG9iX2lkIn19--9583e973a78dfe6588daa5af8c0d4cda5d3c1fa8/3532792.png

When I upload an image from browser it's ok, but after every time I push to GH their URLs are changing and then I got code 404 for all of them.

Do you know why this happens? How can I avoid this from happening and what do you think is the best practice in this sort of situation?