Not sure what happened, and I can't seem to figure out why it is happening. Looks to me like something withing the code causing this? I'm using the latest 1.6.2 version of Project: Red.

http://pastebin.com/SbmhV9UF

This has something to do with the way data is saved in a light. This was tweaked in 1.6.4 version, so update.