Assignment limits to 1000 when devices exceeds 1000 on remediation bundle.

When assigning a bundle from the patch management page where the count is over 1000 the assignment will limit it to the first 1000 devices in the list.

This is working as designed.
Work Around: Use groups or folders of devices over 1000 to make the remediation deployment assignments

The amount of time it takes to add large assignments grows exponentially when deploying a remediation bundle through Patch Management | Patches,  taking up to 30 minutes for the assignment to process. Assigning through a group object avoid the database parsing.