Deployment to AKS uses old image

I'm trying to update an endpoint, that is already deployed at AKS. Here is my workflow:
1. I'm updating a custom image - e.g. update installed libraries. It is registered in private ACR.
2. I call environment.build() - forcing an azureml image to be rebuilt, so that changes in source image will be updated in final image. Please notice, that the built image has the same name: `d2bbe17668204c4f957f17cca62a7db4.azurecr.io/azureml/azureml_02fba29521dca17addff8c3b5f3d93cb`. The only thing that changes is the source docker, which is reflected with a new manifest.
3. Deployment of the new model:
`webservice = Model.deploy(
workspace=ws,
name=service_name,
models=[model],
inference_config=inference_config,
deployment_config=deployment_config,
show_output=True,
overwrite=True
)`

Deployment goes well, however the app runs on the previous image.
In the ACR the latest version is:
`d2bbe17668204c4f957f17cca62a7db4.azurecr.io/azureml/azureml_02fba29521dca17addff8c3b5f3d93cb:latest`
and `sha256:19b9c6dfaa3cd0ad4364719fcdf2a170606b9e43106225748f6785291c43d7f4`
while if I describe a pod in K8 it uses the previous version from cache:
`d2bbe17668204c4f957f17cca62a7db4.azurecr.io/azureml/azureml_02fba29521dca17addff8c3b5f3d93cb@sha256:bc7911cd9109ea3748feba3a56b1f8f8bc8c65b154d75a54bf96b87d80b5e472`
I think that's due to imagePullPolicy: IfNotPresent.
In the kubernetes describe pod I can see, that an image was not pulled but used from cache instead.
I couldn't find any way to change this setting to Always.
I have patched the deployment map and correct image has been pulled, so I know that this option ("Always") would fix this issue for me. Thanks for any help!