I can confirm this issue. My banana pro installation was broken after running apt upgrade. Today I tested with re-installation:
(success) Armbian_20.11_Bananapipro_bionic_current_5.8.16.img
(fails) Armbian_20.11.3_Bananapipro_buster_current_5.9.14.img
(fails) Armbian_20.11.7_Bananapipro_buster_current_5.10.4
The problem is that after a succesfull u-boot the screen becomes black when it (tries to) boot linux. My hdmi monitor turns off.
I tried to create a bug report using https://www.armbian.com/bugs/ but it did not allow me to.