503 error when uploading images

[Pixelrella]

Hi,
I am getting 503 errors when I upload .md files to confluence with md2cf. The error happens when uploading an image. It gives back a page with HTML code with "Atlassian Cloud Notifications - Page Unavailable" in the title:

This does not happen consistently. As you can see in the image, there are several attachments. It is not consistent which of the images fails.

I run this this is a docs-as-code framework where the documentation is published in a test environment for feature branches and in a production environment when merged to main. For the feature branches I use different parents and prefixes to have a build per branch. In the production space there is only one parent. The error occurs in both scenarios.

Things I have tried:

• Deleting the existing pages or existing attachments before the upload.
• Using different output types (console, json)
• Using different spaces (I have on space for the test environment and one as production environment. Both run into this issue as described above.)
• There is no one else (bot or human) editing the page at the time to upload is running.
• When I open the url that fails into the browser, I do not get an error.

Anyone else running into this issue?