Remember last time that you left your browser tab open on the Review page? Remember that you have 20 minutes to finish a review, and if you don’t, it times out. If you have too many reviews time out, this can be seen as an abnormality in your reviewing.
Do make sure that when you are not reviewing to either close the tab, or go to a different part of the Wayfarer website, such as your profile, help, or the showcase. This will help in preventing these time outs from happening.