I'm a bit stumped with this one and wonder if anyone else has come across it.
I've a site live which is using the 'Formerly' plugin amongst others, since a recent update the site has gone offline twice in the last week do to the formerly plugin needing to make changes to the database.
I didn't think this could happen on it's own? It's like the plugins migration wants to run on it's own at weird intervals.
Not sure how to debug this, anyone else had this issue?