Just some things to check.
I have also found it intuitive to look at my syslogs also for firewall blocks and DoS.
and Also as @Steven McPhillips suggest
could you post your airtime check system (Please remember to remove any sensitive info).
Good Luck
VOISSES
While these are basic lets covered them and should that occur check what is happening to source stream on the show builder page.
Maybe a jiggle or toggle may just be the cure.
but posting a snapshot of the ls_script log at the time of the event will help
VOISSES
Good Luck
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