One of customers still running old 12.7 CP2 with 1 primary and 2 secondaries.
Everything was good and smooth but few months ago one of secondaries started to display incorrect page: ahdtop is always correct, welcome banner occasionally is missing, but detail frame (cai_main/ahdframe) is always blank.
How it looks:
Bottom bar stuck in infinite loading...
Browser console displays nothing, also zero errors in stdlogs, vdb and other processes are running fine. So I really have no idea how diag this problem, any suggestions (except of moving to an actual version )?