Hi just had same issue again with B3 and all its Zink bug fixes, Now this could be triggered by Xchecklist, as it start flashing around same time, Odd it only affects CDU1, The other issue im seeing is the radios, VHF, I assume the left is comm one but it seems to switch between the two. Havnt quiet got my head around it just yet.
You’re not on Linux so please don’t use a totally unrelated thread for your issue, it’s confusing for everyone.
Step 1. Disable Zink, it’s not supported by CL-650 1.7, and was auto-enabled by LR in 12.1B1.