G15 5525, BIOS 1.25.0, fails to boot properly on the first cold start

After updating my Dell G15 5525 to BIOS 1.25.0, the laptop fails to boot properly on the first cold startup. The Dell logo appears, the system instantly reboots, and sometimes gets stuck in a Dell-logo boot loop until I force shut it down. On the second manual boot, it starts normally about 90% of the time. Windows, drivers, SSD, and file system are all healthy (SFC/DISM/CHKDSK clean), so the issue happens before Windows loads. This seems to be a BIOS 1.25.0 GPU initialization/ACPI bug affecting the AMD iGPU and hybrid graphics. Since rollback is blocked, a BIOS fix is needed. Please issue an update