Fx unit crashes Wwise

[reeson46]

I have a problem, where a flanger Fx from heavy lib is crashing Wwise every time I tried to use it. I have updated the Wwise SDK version to the latest one. One thing I noticed in the instructions for Windows build, that the code ends like this:
/t:Rebuild Hv_****_WwiseSourcePlugin.sln /m

When I first compiled this Fx patch, I got a Hv_flanger_WwiseFXPlugin.sln, so I just changed the WwiseSourcePlugin into WwiseFXPlugin and the build was successful. I can load the plugin into the fx rack in Wwise just fine, but when I press play and start to change values, it crashes Wwise.