Had the exact same issue on 1.30 experimental, reported it, the devs thought it's a "me" problem. It's not. Something's messed up.
I've tried deleting files, renaming folders, deleting cloud files and disabling cloud sync, verifying, reinstalling the game 5 times, etc... nothing worked. They've told me to reinstal windows. Yeah, not doing that.

the ONLY thing that works for me is setting the view distance to low or poor. Both object and terrain. Usually I play with these settings on Very High. And the rest of the settings are mostly maxed out. I can reduce everything to low and leave the view distance of object and terrain to high and I'll still crash. I feel like it's something with those two settings. The crash prompts no pop-up windows. Just 3 seconds freeze and back to desktop. The crash doesn't even generate a memdump file.

I was playing 1.29 without any issue for an hour or two prior to 1.30 stable update, and then as soon as the update 1.30 dropped I went on to test it to see if the 1.30 crash bug will occur... and it did.. was pretty pissed off.
I feel like this has to be something related to mem leak or something... Even though I still have few free GBs of RAM when the game crashes.

interesting, never had that happen even once since expe started. I block them normally as any other attack.

what unblockable powerpunch ? I can block every new attack without any issue. Furthermore, the new zombies are way more manageable compared to the old ones, thanks to the variety in attacks and not the good old spam of two same attacks attacks.

Change your view distance of object and terrain to poor and let me know if it's stil lhappeneing.