So I noticed this bug now after dying to it twice, but apparently the the M247 can penetrate and trigger an overpressure of the Type 16 despite it not supposed to be able to that. The armor protection analysis says it should not be able to, although I did find an additional bug that the 5mm roof before the turret can be penned at the 90 degree angle it has…
Here is my report on the issue: Community Bug Reporting System
One of the screenshot shows the SAPHEI somehow penning my turret cheek which is around ~70mm effective thickness and 1 shotting me with an overpressure…
Until this bug gets fixed, be careful using this vehicle around any M247!