Why is there RF leakage in the shielding? The shielding is aluminum meshed metal and it has holes. However, the holes are very small compared to the wavelength of RF. My understanding is that RF shielding blocks and absorbs the RF energy.
It may be useful.
https://www.digikey.com/en/articles/techzone/2013/jan/rf-shielding-the-art-and-science-of-eliminating-interference
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