I just experienced an very disappointing bug with the fixture builder. I was working on a fixture type for many hours last night and I come back only to find that the WIP revision that I saved is missing about 2-3 hours worth of work. In more detail, I had been working on this fixture up til around 9:30pm last night, watched a movie, came back and opened the builder tab I already had opened and continued working on it until 3am at which point I uploaded the fixture revision and went to bed. Come back in the morning to test it only to find that the progress I had made after the movie is completely gone. I know this is the same revision cause the name is the exact same as what I set before going to bed. My only guess is the session had possibly expired after I left my computer idle, but there was no indication on the builder that anything had happened and I was even able to submit a revision long after I had left my computer idle. Data loss like this is completely unacceptable!