I experienced the hanging issue. Enabled the first serial port and booted into haiku successfully one time.
However on rebooting, it’s again hung at the exact same point. The serial port is still enabled. I tried disabling then reenabling, enabling both 1 and 2, still hangs right when all the icons are lit up.
I did absolutely nothing with haiku other than check for network connectivity and reboot. Fresh install. Any idea why it would hang again on rebooting after working once?