Another update. Tried this time little different. Downloaded usb 20200720 image, made reflash. After install check updates from menu, one available, boot logo, after update from menu, restart and stopped on hisilicone logo. Once more usb install 20200720 helped to fix hang. Once more this update available in update menu. Usb 20200720 as it self after reflash operated for me fine.
This is what makes it complicated, some times it works, sometimes it doesn't, and when it doesn't boot, it is very difficult to find out why.
if there is any error log created let me know and i can upload here.
currently i made usb reflash to image 7.3 20200718, in menu i see some packages to update but will wait a little, maybe You'll release some fixed ones.
if any help needed for testing, just let me know.