I just upgraded to TG4 and noticed if I pause a render (even the default file) I can't restart the render. I tried using TG3 and renders resume just fine.
My system is a Win10 Pro Ryzen 1800x with 64GB memory. Not overclocked. Haven't had any problems with Zbrush, 3D Coat, Lightwave, or benchmarking software, so I'm clueless to what's wrong. I have tried changing maximum threads from 64 to 1, but still TG4 locks up.