Volvo S80 T5 Misfire ONLY SOMETIMES (Ignition Coil B) need Help..

This volvo S80 is giving me Ignition coil B since i bought it last year, i changed the Spark Plugs, checked the gap, i replaced all coil packs.
It misfires from time to time, and everytime i check it gives me Ignition Coil B, this video is just to show that it doesnt misfire right away, but sometimes, it depends on the trottle i guess? i changed coils from A to B, C to D, and so on, and it always gives me Ignition Coil B.
In the video it misfired on cilinder 5 for some weird reason, Ignition Coil B is the one i touched first on the video, which has black tape on the wire.
If anyone could help me find out what could possibly be causing this let me know
The car has new oil, filters, new vvt solenoid, new mass air flow sensor, new plugs, new coil packs.
I swapped injector from cylinder 2 (B) to cylinder 4 (D) and had the same Ignition coil B code thrown.
Thanks.