The mdmp file the issue creates on crash says its an "access violation"
Here's the console history (reversed)
2594(94.885109): CAsyncWriteInProgress::OnComplete( "cfg/cached_hero_builds.kv3" ) -> Success at 94.885
2593(94.877291): WriteSteamRemoteStorageFileAsync(...
In many of my replays specific characters have their models exploded covering the whole map in a stretched distorted way as seen in the screen shot. In some replays this crashes my game. It is accompanied by the message:
[Animation 2] Global Blend - Attempting a global blend with an additive...