Have noticed this issue and have been told be peers when i myself have been stuck in it.
theory: related to 'desync' between two individual clients when an item switch occurs.
It seems to stop whenever you switch to another item, but with varying degrees of reliability sometimes multiple switches are required before the peer stops witnessing it.
It is often only one other person that can see it. Rather than a number of people
Source: several occurences in 5-6 man squad between varying members.