Assassin's Creed Brotherhood shadows flickering issue

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Dear G9 Devs,

I'm currently running ACB via G9 with outstanding performances (my gpu is AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] vendor: Sapphire Nitro+), the only hideous issue is with some very eyes hurting shadows flickering on the protagonist cape and costume. The solution I found to circumvent this problem was changing the protagonist outfit to a totally black version of his costume, with the white one the flickering is almost eyes damaging. I've successfully made an apitrace to help you find a fix. https://drive.google.com/file/d/1WdU6N_qyIQ4yTkvuOfAKh8nfluBIVekk/view?usp=sharing

Thanks in advance for your help