Yes, I am aware of this being a general problem in conference interpreting, not only related to the current situation and the use of headphones. The main problem is that headphones are not just worn professional gear—this we are used to—but in this day and age many parliaments are using improvised ad hoc connections that are not engineered and controlled by humans, by qualified sound technicians or sound engineers, but controlled by algorithms. These algorithms are a bit to sound engineering what automated translations are for conference interpreting. It seems to work, but it comes with a lot of distorted sound. This distorted sound is what causes headaches.
On February 4th, 2021. See this statement in context.