I have had twitchy eyelids once in a while my whole life. I haven’t noticed it being any more frequent since starting Soylent - if anything, it happens less often, I can’t recall for sure that it has happened at all in the past few years. In my case it has always gone away after a day or so.
And maybe this is something totally different; it’s not my eye that twitches, but I can feel my eyelid vibrating up and down a little bit when I try to relax with my eyes open. Basically a small muscle spasm in the fiber that moved the eyelid.