I saw this post by xxmai for contributors on the feeds, where they asked to not put "imaginary" end dates to titles that don't have an official end date announced anywhere. (https://mydramalist.com/profile/xxmai/feeds/DkvA1NUx)
There are more than a few series that don't have that kind of official end dates. Which means, as long at the bug I report earlier is not resolved, the chances for reviewers to mark their reviews as "completed" when they should be "ongoing" is much higher.
(Let alone the fact that I could write a "completed" review now for, say, Man of Virtue, a drama that hasn't even started yet.)
It should be possible to program the condition that ticking "completed" is allowed only after the drama has left the status "airing". Right?