Hi,
The playbacks and tracks use the same resources of the device, so it's not possible to leave them on at this time.
But there are ways to prevent a blackout.
Showcontrol uses different resources, and keeps working when editing tracks. So you could create a scene by controlling DMX channels directly from Showcontrol.
Alternatively, you could use another device to output Artnet to the CueCore/QuadCore, and use Showcontrol to merge this with the venue's DMX universe. This can be merged with Priority.