CDP enable after factory reset cause the phone can't obtain IP address

[ccy]

After a week of trial and error, no matter how I tweak the configuration, the phone will only obtain IP address with CDP disabled if it is connected to nested switch.
(It can obtain IP address successfully with CDP enabled only if connected to the main switch directly.)
I am not using a Cisco switch nor there is any Cisco devices in the network, so I decided to downgrade the firmware of the phone itself.

After downgrading to the previous firmware, even with CDP enabled by default, it is still able to obtain the IP address without any issues after factory reset or rebooting.
Current Firmware: T23-44.84.0.10.rom
Previous Firmware: T23-44.83.0.50.rom

Wish to know if this is a bug or intended behaviour.
Thank you.