This is by far the latest I've seen revegging in central California and I've been doing this a very long time.
They WILL reveg and you'll get a nice yield.
Sometimes you just need to let nature do her thing.
Most plants will veg for about six weeks longer before going into flower, about August 1st.
After this year's experience, I intend to use supplemental lights to increase day length, next Spring, to insure that this doesn't happen again.
I figure I'll be 20%-30% short of last year's (huge) yield.