Channel shows in Editor, but not in actual show

[DocBrown86]

Here's a new one for me this year: I have a light strand programmed on Unit 8: Circuit 7. This strand has been there in previous years. This year, when I run the show as a whole or a sequence in SE, that channel refuses to light up. It also won't light in the Preview. When I check channel settings in Preview, all is normal. When I check in SE itself, it matches. Using Hardware Utility, the channel and lights work fine. Fading etc all functions.

Any ideas as to why SE is suddenly ignoring this channel?