UR824 - ADAT issues - Signal crackling/cutting out

I’m using Cubase 11.5, and a UR824 as my main interface. Last year I expanded my inputs with a Scarlett Octopre using the ADAT function. This worked flawlessly up until a week or two ago. Now, I’m getting the problems as shown in the video. Let me know if there’s anything you can think of that I can troubleshoot that I may not have thought of yet.

Thank you,

How do you clock the units? 824 as master and Audient as slave? BNC connected? 75 ohm terminated? All cables checked recently?

I have the exact same stuff as you but not the problems.