I'm working on a eq system for automobiles, and the AMP is i2s input digital class D, so I choose adau1761 to work at 96K sample rate

this is a very simple schematic and all EQ are double. but problem is, I could put more EQs but if total EQ more than 22 filters (above one EQ 15 filters and the other 7 filters) then great noise will be there. need to increase filter bands, any idea ? or this is the bug of ADAU1761?

BTW, when I'm using 44.1K sample rate, it could put up to 75 filters without any problem. any hints ? (each EQ has 15 filters)