Showing how Live Photos shot on iPhone 8 Plus will Boomerang in Instagram Stories and how Live Photos shot on iPhone 11 Pro Max won't Boomerang in Instagram Stories.

Timeline:

October 5, 2019 -- not working
October 8, 2019 -- working
October 27-31, 2019 [approx] -- not working again.
November 15, 2019 - working again

What up, Instagram?