Lit Windows Sequence

Greetings all, I'm building a haunted mansion ride and trying to create an animation sequence of lit windows. That is, they turn on then turn off in sequence. But I have been facing issues getting the sequences and the windows to behave correctly. When I put a series of windows in a trigger sequence (all windows start off as black/no image), the lights to turn on in sequence but at the end of the sequence they all return to being lit. Then when I play the sequence again, the triggers turn off the windows (they go to dark) and then go back to lit once the trigger has passed.

This really has gotten annoying and want to know what I'm doing wrong. Or is this a bug? Thanks!
 
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