msc / macro bug ?

I have lots of video running on dataton/watchout trigged by msc from eos, via medialon.
Most of the time all is fine, I just have to reboot the show control gateway now and then.
But while a video-sequence was running I tried to park some xtra worklights by using a preprogrammed macro. All video stopped.
[goto Q] [enter] brought back the video. Seems like a preprogrammed park-macro sends something(?) to the msc device...? Is it supposed to?

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