Most of my garage seams were split but repaired at one year warranty. Still holding.
(UPDATE: Hadn't actually checked in a while. Repairs not holding at garage ceiling either, re-cracking at repaired areas and unfixed areas are continuing along straight line to the wall.)
That's not the case with the lanai cracks repaired at same time. Cracks opened again after a few months. Hate to spend the money to have repaired again and again.
Last spoke with warranty yesterday. They had no fix to offer. Only the name of original drywaller.
Have reported info to POA as requested by them.
The last "Cracked Ceiling Update" that I've seen is in the December 2017 POA Bulletin on Page 2.
http://www.poa4us.org/bulletins_files/bulletin201712.pdf