I try deleting Payload folder, my console still boot. So, no, it's not the cause of problem.
We already face some people who has the same problem before.
One of the cause is while installing A9LH when get the bugged screen,
User become panic and shutdown while SafeA9LHinstaller not finishing the process,
Making a NAND become corrupted and can't be load.
having the payload in luma fixed my problem, its require for the installing, not after you installed.