Same with me dude. Android One logo gone. On restating all the four side become bluish and Also noticing a white bright pixel on bottom left side of screen. After sometime Nokia logo appear. After nokia logo appears the bluish screen gone. Before update this white pixel was not there. Is anyone facing this issue after September security update. Please do comment here. My main concern is the white bright pixel.
Just restarted my phone to have a look. No issue for me here, the Android One logo shows, slides to the right, then Nokia. It might be variant specific, my build is v2.22E_SP3 (a short way of writing it).
Mine variant is 00WW_2_22E_SP03 after september security update. I restart my device 10-12 time to double check but still no Android One logo on display during start up. The bluish screen and Nokia logo than direct boot to homescreen.