What is your wM version and IS + PRT fix levels?
Do you see any errors in the logs at the time of deployment?
Remove and redeploy the model again, but this time, increase the logging level for PRT on the IS.
Share both the model deployment logs and Designer logs here for further review.
In addition, take a look at this post and see if that helps (link) - yes, the IS version on the post is quite old, but some principles still apply.
KM