objects being applied even if underlying dependencies did not change

[ergleb78]

Hi!
It looks like the .apply rule applies k8s objects even if there are dependencies are not changed.
For example, it applies deployment even image was not rebuilt. Is this expected behavior?
I'm using a custom macro to emulate "kustomize", and does some substitutions, but underlying values do not change.
Not sure if it causes this.
Please point out what I'm missing?

Thanks!