Lightsail deployment fails: took too long

I am new to Lightsail and try to deploy a docker image of a small spring boot application. Deploying the image locally works fine, pushing it to lightsail works, but when I try to deploy the image to my container, it constantly fails with: deployment:XX took to long.

I used the CLI and set the timeout for healthcheck to even 120 seconds. The logs state that the deployment has sucessfully finished after ~30 seconds.

However it finally fails after 120 seconds with the mentioned error, ‚took to long‘.

The logs give no hint as they are very poor anyway.

What can I try to do?