I had an issue along similar lines when I upgraded from 4.3 to 4.7 this week.
Some active subscriptions were cancelled during the upgrade whereas others continued on as normal. It looks like it only affected the long time subscribers who had been continually renewing on an older sub created on a different platform and carried over from a previous conversion. Those subs got cancelled, but ones created on invision seemed to be fine.
Were your older subscriptions created on this platform or converted to invision from something else?
The ip address connected to my cancellations resolved to Australia. And when I clicked on that ip it brought up a list of members whose subs had been cancelled.
See below
