Running a 5-platform 1440-athlete competition (USAW VMS Finals and UMWF Worlds) triggered repeatedly an issue that had either been absent or too random to figure out in prior meets -- one or two platforms is not quite the same.
Every once in a while, the list of athletes would disappear from the announcer screen, but a refresh would instantly bring it back. Or timers would start/stop randomly on the announcer/marshal screens. A cause was identified and is believed to have been fixed, and the problem has not reappeared.
You are strongly encouraged to move to version 63.3.1.