First, I’d stop icing as that shuts down everything your body naturally does to heal/ clear the area.
People, We’ve Got to Stop Icing Injuries. We Were Wrong, Sooo Wrong | Community Video
(A year later) Peoples, We’ve Got to Stop Icing. A Year Later…. | Community Video
Are you over extended when you stand?
Torsion and trunk stability
Do you sleep on your back?
Could be sleep in a less than optimal position which can be a contributing factor.
Are you seeing any improvements with what you are working on?