I order a mid-air construction (top priority) which requires wearing jetpacks; otherwise dupes can't reach the construction site. When the site is very far away, dupes will sometimes get stuck in an infinite loop. Receive his assignment -> Pick up materials -> instantly forget about the errand (maybe consider the errand unreachable for a blink of second) -> perform another errand and therefore drop his inventory -> receive the mid-air errand again right away ->repeat. So it looks like he does nothing but keep picking up and dropping the material.
Steps to Reproduce
See description. Long distant errand that is unreachable except with jetpacks..
This issue has not been confirmed by a developer yet.