Recently I was playing my survival world, nothing special, but when I shift + clicked in furnace to add coal the game crashed. Here's my crash report.

https://pastebin.com/X69iWQsQ

Can confirm this happens to me also. Looks its caused by an exception loop in ItemRendererMixin

try {
     doSwap(stack, matrices, model, x, y, cbi);
} catch (Exception e) {
    SwapUtil.reset(); // Here is where loop is probably caused, maybe just default to normal swap without smoothing as temp fix
}

same issue

it also crashed randomly sometimes

Can confirm this happens to me also. Looks its caused by an exception loop in ItemRendererMixin

This was my attempt to make it into a normal swap, but I guess it didn't work, but I have a hopefully more robust solution now which should work better