@Saranow Hi Sara - I'm currently experiencing the same issue and have a video of it happening if you have an email address for me to send it over? It's something I've noticed most times I've tried to use the fixture editor in my history of using the console so not a new issue, but one that's never bothered me enough to report before!
You can either attach it to this post or in a private message, or send it to service (at) etcconnect (dot) com and mention this post, please.
Thank you so much!
No worries - looks like it hasn't worked from my end (it's quite a large video) so I can email to service if you can't open it! :)
I was able to retrieve the file. I think the preview is broken because of the size, however.
I'll get this written up as a bug so we can get it fixed.
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