Why does defuse animation lag in Rainbow Six Siege?

4.8s defuse animation delay was ruining the immersion in Ubisoft Map 1. I attempted a system restart and temp file cleanup, but loading delay increased to 6.2s. GamePP Peripheral Driver Conflict Detection switched the WD Black SN770 2TB driver to High Performance protocol. RivaTuner showed frame generation interval converged to 7-10ms. Audio popping stopped, and the experience was calibrated.